/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:16:59,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:16:59,827 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:16:59,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:16:59,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:16:59,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:16:59,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:16:59,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:16:59,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:16:59,866 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:16:59,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:16:59,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:16:59,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:16:59,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:16:59,869 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:16:59,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:16:59,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:16:59,869 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:16:59,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:16:59,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:16:59,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:16:59,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:16:59,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:16:59,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:16:59,871 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:16:59,871 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:16:59,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:16:59,871 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:16:59,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:16:59,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:16:59,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:16:59,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:16:59,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:16:59,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:16:59,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:16:59,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:16:59,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:16:59,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:16:59,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:17:00,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:17:00,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:17:00,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:17:00,141 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:17:00,142 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:17:00,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-12-15 22:17:01,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:17:01,450 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:17:01,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-12-15 22:17:01,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8683aef85/2a28b82fa91e485d9acce38208ea2db9/FLAGf346a4434 [2023-12-15 22:17:01,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8683aef85/2a28b82fa91e485d9acce38208ea2db9 [2023-12-15 22:17:01,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:17:01,471 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:17:01,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:17:01,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:17:01,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:17:01,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782367a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01, skipping insertion in model container [2023-12-15 22:17:01,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:17:01,613 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-12-15 22:17:01,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:17:01,658 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:17:01,667 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-12-15 22:17:01,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:17:01,685 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:17:01,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01 WrapperNode [2023-12-15 22:17:01,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:17:01,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:17:01,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:17:01,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:17:01,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,713 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2023-12-15 22:17:01,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:17:01,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:17:01,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:17:01,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:17:01,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,735 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]. [2023-12-15 22:17:01,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:17:01,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:17:01,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:17:01,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:17:01,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (1/1) ... [2023-12-15 22:17:01,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:17:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:01,780 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) [2023-12-15 22:17:01,782 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 [2023-12-15 22:17:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:17:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 22:17:01,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 22:17:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:17:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:17:01,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:17:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-15 22:17:01,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-15 22:17:01,866 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:17:01,867 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:17:02,011 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:17:02,033 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:17:02,033 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 22:17:02,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:17:02 BoogieIcfgContainer [2023-12-15 22:17:02,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:17:02,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:17:02,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:17:02,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:17:02,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:17:01" (1/3) ... [2023-12-15 22:17:02,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d32b08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:17:02, skipping insertion in model container [2023-12-15 22:17:02,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:17:01" (2/3) ... [2023-12-15 22:17:02,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d32b08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:17:02, skipping insertion in model container [2023-12-15 22:17:02,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:17:02" (3/3) ... [2023-12-15 22:17:02,041 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2023-12-15 22:17:02,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:17:02,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:17:02,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:17:02,100 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;@1bb4c598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:17:02,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:17:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-15 22:17:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:17:02,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:02,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:02,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:02,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:02,118 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2023-12-15 22:17:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944432140] [2023-12-15 22:17:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:02,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944432140] [2023-12-15 22:17:02,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 22:17:02,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374462999] [2023-12-15 22:17:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:02,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:02,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:02,228 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) [2023-12-15 22:17:02,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:17:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:02,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 22:17:02,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:17:02,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:02,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374462999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:02,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:02,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:17:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259101348] [2023-12-15 22:17:02,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:02,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 22:17:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:02,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 22:17:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:17:02,353 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:17:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:02,378 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2023-12-15 22:17:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 22:17:02,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-15 22:17:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:02,386 INFO L225 Difference]: With dead ends: 62 [2023-12-15 22:17:02,386 INFO L226 Difference]: Without dead ends: 30 [2023-12-15 22:17:02,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:17:02,391 INFO L413 NwaCegarLoop]: 40 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, 40 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 [2023-12-15 22:17:02,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-15 22:17:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-15 22:17:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 22:17:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-12-15 22:17:02,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2023-12-15 22:17:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:02,423 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-12-15 22:17:02,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:17:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-12-15 22:17:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 22:17:02,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:02,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:02,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:02,630 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 [2023-12-15 22:17:02,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:02,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2023-12-15 22:17:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033283042] [2023-12-15 22:17:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:02,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:02,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879787650] [2023-12-15 22:17:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:02,660 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) [2023-12-15 22:17:02,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:17:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:02,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 22:17:02,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:02,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033283042] [2023-12-15 22:17:02,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879787650] [2023-12-15 22:17:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879787650] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:02,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:02,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 22:17:02,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050854725] [2023-12-15 22:17:02,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:02,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 22:17:02,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 22:17:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 22:17:02,769 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:02,800 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-12-15 22:17:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 22:17:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-12-15 22:17:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:02,803 INFO L225 Difference]: With dead ends: 39 [2023-12-15 22:17:02,803 INFO L226 Difference]: Without dead ends: 32 [2023-12-15 22:17:02,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 22:17:02,805 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:02,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-15 22:17:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-15 22:17:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 22:17:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-12-15 22:17:02,812 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-12-15 22:17:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:02,813 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-12-15 22:17:02,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-12-15 22:17:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 22:17:02,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:02,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:02,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:03,021 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 [2023-12-15 22:17:03,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:03,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2023-12-15 22:17:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300119025] [2023-12-15 22:17:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:03,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:03,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584013513] [2023-12-15 22:17:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:03,044 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) [2023-12-15 22:17:03,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:17:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:03,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 22:17:03,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:03,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300119025] [2023-12-15 22:17:03,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584013513] [2023-12-15 22:17:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584013513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:03,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 22:17:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62867492] [2023-12-15 22:17:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:03,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 22:17:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 22:17:03,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 22:17:03,127 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:03,209 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2023-12-15 22:17:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:17:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-12-15 22:17:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:03,211 INFO L225 Difference]: With dead ends: 52 [2023-12-15 22:17:03,211 INFO L226 Difference]: Without dead ends: 45 [2023-12-15 22:17:03,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:17:03,212 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:03,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 129 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-15 22:17:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-12-15 22:17:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 22:17:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-15 22:17:03,221 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-12-15 22:17:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:03,221 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-15 22:17:03,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-15 22:17:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-15 22:17:03,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:03,223 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] [2023-12-15 22:17:03,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 22:17:03,430 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 [2023-12-15 22:17:03,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:03,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2023-12-15 22:17:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889297250] [2023-12-15 22:17:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:03,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:03,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982359654] [2023-12-15 22:17:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:03,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:03,449 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) [2023-12-15 22:17:03,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:17:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:03,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 22:17:03,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:03,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:03,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:03,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889297250] [2023-12-15 22:17:03,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:03,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982359654] [2023-12-15 22:17:03,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982359654] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:03,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:03,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 22:17:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773343825] [2023-12-15 22:17:03,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:03,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:17:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:17:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:17:03,530 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:03,550 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-12-15 22:17:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:17:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-15 22:17:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:03,551 INFO L225 Difference]: With dead ends: 57 [2023-12-15 22:17:03,551 INFO L226 Difference]: Without dead ends: 35 [2023-12-15 22:17:03,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:17:03,552 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:03,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-15 22:17:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-15 22:17:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 22:17:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-12-15 22:17:03,559 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2023-12-15 22:17:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:03,559 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-12-15 22:17:03,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-12-15 22:17:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-15 22:17:03,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:03,560 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] [2023-12-15 22:17:03,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:03,765 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 [2023-12-15 22:17:03,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:03,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2023-12-15 22:17:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737099811] [2023-12-15 22:17:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:03,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:03,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092572464] [2023-12-15 22:17:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:03,785 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) [2023-12-15 22:17:03,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:17:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:03,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 22:17:03,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:04,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737099811] [2023-12-15 22:17:04,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092572464] [2023-12-15 22:17:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092572464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:04,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:04,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-15 22:17:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708527791] [2023-12-15 22:17:04,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:04,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:17:04,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:17:04,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:17:04,074 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:04,190 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-12-15 22:17:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 22:17:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-15 22:17:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:04,193 INFO L225 Difference]: With dead ends: 53 [2023-12-15 22:17:04,193 INFO L226 Difference]: Without dead ends: 51 [2023-12-15 22:17:04,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:17:04,196 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:04,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 164 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:17:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-15 22:17:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-12-15 22:17:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 22:17:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2023-12-15 22:17:04,223 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2023-12-15 22:17:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:04,223 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2023-12-15 22:17:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2023-12-15 22:17:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 22:17:04,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:04,225 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] [2023-12-15 22:17:04,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:04,429 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 [2023-12-15 22:17:04,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:04,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2023-12-15 22:17:04,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:04,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765338427] [2023-12-15 22:17:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:04,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:04,441 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72133332] [2023-12-15 22:17:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:04,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:04,446 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) [2023-12-15 22:17:04,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:17:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:04,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 22:17:04,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:04,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765338427] [2023-12-15 22:17:04,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72133332] [2023-12-15 22:17:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72133332] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:04,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:04,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-15 22:17:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817690242] [2023-12-15 22:17:04,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:04,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 22:17:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 22:17:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-15 22:17:04,603 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:04,737 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2023-12-15 22:17:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 22:17:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-12-15 22:17:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:04,743 INFO L225 Difference]: With dead ends: 146 [2023-12-15 22:17:04,743 INFO L226 Difference]: Without dead ends: 139 [2023-12-15 22:17:04,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:17:04,745 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:04,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 207 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:17:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-15 22:17:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2023-12-15 22:17:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-15 22:17:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2023-12-15 22:17:04,780 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2023-12-15 22:17:04,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:04,781 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2023-12-15 22:17:04,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2023-12-15 22:17:04,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 22:17:04,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:04,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:04,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-15 22:17:04,987 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 [2023-12-15 22:17:04,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:04,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2023-12-15 22:17:04,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:04,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409249886] [2023-12-15 22:17:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:04,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:05,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:05,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803170858] [2023-12-15 22:17:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:05,017 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) [2023-12-15 22:17:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:17:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:05,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 22:17:05,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:05,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409249886] [2023-12-15 22:17:05,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803170858] [2023-12-15 22:17:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803170858] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:05,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:05,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-15 22:17:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411210592] [2023-12-15 22:17:05,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:17:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:17:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:17:05,188 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:17:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:05,373 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2023-12-15 22:17:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 22:17:05,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-12-15 22:17:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:05,376 INFO L225 Difference]: With dead ends: 182 [2023-12-15 22:17:05,376 INFO L226 Difference]: Without dead ends: 170 [2023-12-15 22:17:05,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-15 22:17:05,377 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:05,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 320 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:17:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-15 22:17:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-12-15 22:17:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-15 22:17:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2023-12-15 22:17:05,397 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2023-12-15 22:17:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:05,398 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2023-12-15 22:17:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:17:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2023-12-15 22:17:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 22:17:05,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:05,399 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, 1, 1, 1] [2023-12-15 22:17:05,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:05,604 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 [2023-12-15 22:17:05,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:05,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2023-12-15 22:17:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:05,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182961801] [2023-12-15 22:17:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:05,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:05,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:05,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35116670] [2023-12-15 22:17:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:05,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:05,621 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) [2023-12-15 22:17:05,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:17:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:05,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 22:17:05,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:05,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182961801] [2023-12-15 22:17:05,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35116670] [2023-12-15 22:17:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35116670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:17:05,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 22:17:05,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-15 22:17:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712466569] [2023-12-15 22:17:05,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 22:17:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 22:17:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:17:05,890 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 22:17:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:06,026 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2023-12-15 22:17:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 22:17:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-15 22:17:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:06,029 INFO L225 Difference]: With dead ends: 142 [2023-12-15 22:17:06,029 INFO L226 Difference]: Without dead ends: 140 [2023-12-15 22:17:06,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-12-15 22:17:06,031 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 186 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:17:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-15 22:17:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2023-12-15 22:17:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-15 22:17:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2023-12-15 22:17:06,073 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2023-12-15 22:17:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:06,074 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2023-12-15 22:17:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 22:17:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2023-12-15 22:17:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 22:17:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:06,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:06,283 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 [2023-12-15 22:17:06,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2023-12-15 22:17:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741633580] [2023-12-15 22:17:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:06,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115989715] [2023-12-15 22:17:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:06,296 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) [2023-12-15 22:17:06,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 22:17:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:06,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-15 22:17:06,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:17:06,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:06,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741633580] [2023-12-15 22:17:06,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115989715] [2023-12-15 22:17:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115989715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:06,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:06,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-12-15 22:17:06,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430779187] [2023-12-15 22:17:06,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:06,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 22:17:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:06,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 22:17:06,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-15 22:17:06,620 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:06,877 INFO L93 Difference]: Finished difference Result 182 states and 250 transitions. [2023-12-15 22:17:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 22:17:06,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-12-15 22:17:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:06,879 INFO L225 Difference]: With dead ends: 182 [2023-12-15 22:17:06,879 INFO L226 Difference]: Without dead ends: 180 [2023-12-15 22:17:06,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-15 22:17:06,880 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:06,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 398 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:17:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-15 22:17:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2023-12-15 22:17:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-15 22:17:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2023-12-15 22:17:06,901 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2023-12-15 22:17:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:06,902 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2023-12-15 22:17:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2023-12-15 22:17:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 22:17:06,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:06,903 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] [2023-12-15 22:17:06,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:07,107 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 [2023-12-15 22:17:07,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:07,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2023-12-15 22:17:07,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:07,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541861773] [2023-12-15 22:17:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:07,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:07,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420185616] [2023-12-15 22:17:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:07,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:07,119 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) [2023-12-15 22:17:07,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 22:17:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:07,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 22:17:07,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:07,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:07,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:07,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541861773] [2023-12-15 22:17:07,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:07,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420185616] [2023-12-15 22:17:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420185616] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:17:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984354041] [2023-12-15 22:17:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 22:17:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 22:17:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 22:17:07,204 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:07,235 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2023-12-15 22:17:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:17:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-12-15 22:17:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:07,236 INFO L225 Difference]: With dead ends: 236 [2023-12-15 22:17:07,236 INFO L226 Difference]: Without dead ends: 169 [2023-12-15 22:17:07,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 22:17:07,238 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:07,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 102 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-15 22:17:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-12-15 22:17:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-15 22:17:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2023-12-15 22:17:07,259 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2023-12-15 22:17:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:07,260 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2023-12-15 22:17:07,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2023-12-15 22:17:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-15 22:17:07,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:07,261 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:07,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:07,466 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 [2023-12-15 22:17:07,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:07,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2023-12-15 22:17:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754484630] [2023-12-15 22:17:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:07,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746836293] [2023-12-15 22:17:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:07,486 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) [2023-12-15 22:17:07,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 22:17:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:07,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 22:17:07,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:17:07,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754484630] [2023-12-15 22:17:11,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746836293] [2023-12-15 22:17:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746836293] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:17:11,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 22:17:11,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-15 22:17:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407262101] [2023-12-15 22:17:11,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 22:17:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 22:17:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-12-15 22:17:11,895 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-15 22:17:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:12,104 INFO L93 Difference]: Finished difference Result 191 states and 257 transitions. [2023-12-15 22:17:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 22:17:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-12-15 22:17:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:12,106 INFO L225 Difference]: With dead ends: 191 [2023-12-15 22:17:12,106 INFO L226 Difference]: Without dead ends: 189 [2023-12-15 22:17:12,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-12-15 22:17:12,107 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:12,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:17:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-15 22:17:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2023-12-15 22:17:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 138 states have (on average 1.326086956521739) internal successors, (183), 139 states have internal predecessors, (183), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-15 22:17:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 252 transitions. [2023-12-15 22:17:12,128 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 252 transitions. Word has length 34 [2023-12-15 22:17:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:12,129 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 252 transitions. [2023-12-15 22:17:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-15 22:17:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 252 transitions. [2023-12-15 22:17:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-15 22:17:12,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:12,130 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-15 22:17:12,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:12,335 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 [2023-12-15 22:17:12,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:12,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2023-12-15 22:17:12,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:12,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457991344] [2023-12-15 22:17:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:12,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:12,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30939443] [2023-12-15 22:17:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:12,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:12,346 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) [2023-12-15 22:17:12,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 22:17:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:12,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-15 22:17:12,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:12,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:12,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457991344] [2023-12-15 22:17:12,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30939443] [2023-12-15 22:17:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30939443] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:12,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2023-12-15 22:17:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667206098] [2023-12-15 22:17:12,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 22:17:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 22:17:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-15 22:17:12,858 INFO L87 Difference]: Start difference. First operand 188 states and 252 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-15 22:17:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:14,468 INFO L93 Difference]: Finished difference Result 348 states and 497 transitions. [2023-12-15 22:17:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 22:17:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-12-15 22:17:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:14,475 INFO L225 Difference]: With dead ends: 348 [2023-12-15 22:17:14,476 INFO L226 Difference]: Without dead ends: 346 [2023-12-15 22:17:14,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:17:14,477 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 359 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:14,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 360 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 22:17:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-12-15 22:17:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 330. [2023-12-15 22:17:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 258 states have internal predecessors, (346), 67 states have call successors, (67), 15 states have call predecessors, (67), 15 states have return successors, (66), 56 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 22:17:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 479 transitions. [2023-12-15 22:17:14,543 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 479 transitions. Word has length 36 [2023-12-15 22:17:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:14,543 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 479 transitions. [2023-12-15 22:17:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-15 22:17:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 479 transitions. [2023-12-15 22:17:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 22:17:14,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:14,544 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:14,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:14,748 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 [2023-12-15 22:17:14,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:14,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2023-12-15 22:17:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458681417] [2023-12-15 22:17:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:14,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061869794] [2023-12-15 22:17:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:14,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:14,760 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) [2023-12-15 22:17:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 22:17:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:14,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 22:17:14,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 22:17:14,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-15 22:17:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458681417] [2023-12-15 22:17:15,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061869794] [2023-12-15 22:17:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061869794] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 22:17:15,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 22:17:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-12-15 22:17:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818751812] [2023-12-15 22:17:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:17:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:17:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:17:15,023 INFO L87 Difference]: Start difference. First operand 330 states and 479 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 22:17:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:15,113 INFO L93 Difference]: Finished difference Result 336 states and 484 transitions. [2023-12-15 22:17:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:17:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-12-15 22:17:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:15,116 INFO L225 Difference]: With dead ends: 336 [2023-12-15 22:17:15,116 INFO L226 Difference]: Without dead ends: 334 [2023-12-15 22:17:15,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-15 22:17:15,117 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:15,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-15 22:17:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2023-12-15 22:17:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 250 states have (on average 1.388) internal successors, (347), 261 states have internal predecessors, (347), 67 states have call successors, (67), 16 states have call predecessors, (67), 16 states have return successors, (66), 56 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 22:17:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 480 transitions. [2023-12-15 22:17:15,190 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 480 transitions. Word has length 39 [2023-12-15 22:17:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:15,190 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 480 transitions. [2023-12-15 22:17:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 22:17:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 480 transitions. [2023-12-15 22:17:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-15 22:17:15,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:15,191 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:15,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:15,396 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 [2023-12-15 22:17:15,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:15,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2023-12-15 22:17:15,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:15,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138584926] [2023-12-15 22:17:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:15,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034137356] [2023-12-15 22:17:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:15,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:15,407 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) [2023-12-15 22:17:15,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 22:17:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:15,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 22:17:15,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 22:17:15,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 22:17:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138584926] [2023-12-15 22:17:15,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034137356] [2023-12-15 22:17:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034137356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:15,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:15,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-15 22:17:15,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574342973] [2023-12-15 22:17:15,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 22:17:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 22:17:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-15 22:17:15,578 INFO L87 Difference]: Start difference. First operand 334 states and 480 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:15,833 INFO L93 Difference]: Finished difference Result 813 states and 1156 transitions. [2023-12-15 22:17:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 22:17:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-12-15 22:17:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:15,837 INFO L225 Difference]: With dead ends: 813 [2023-12-15 22:17:15,837 INFO L226 Difference]: Without dead ends: 598 [2023-12-15 22:17:15,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-12-15 22:17:15,839 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 130 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:15,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 254 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:17:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-12-15 22:17:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 568. [2023-12-15 22:17:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 412 states have (on average 1.3300970873786409) internal successors, (548), 426 states have internal predecessors, (548), 118 states have call successors, (118), 37 states have call predecessors, (118), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2023-12-15 22:17:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 780 transitions. [2023-12-15 22:17:15,939 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 780 transitions. Word has length 37 [2023-12-15 22:17:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:15,939 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 780 transitions. [2023-12-15 22:17:15,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 780 transitions. [2023-12-15 22:17:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-15 22:17:15,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:15,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:15,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:16,146 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 [2023-12-15 22:17:16,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:16,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2023-12-15 22:17:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902657421] [2023-12-15 22:17:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:16,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815252426] [2023-12-15 22:17:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:16,155 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) [2023-12-15 22:17:16,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 22:17:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:16,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-15 22:17:16,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:16,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:17:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902657421] [2023-12-15 22:17:16,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815252426] [2023-12-15 22:17:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815252426] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:16,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:16,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-15 22:17:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095140839] [2023-12-15 22:17:16,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 22:17:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 22:17:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-15 22:17:16,343 INFO L87 Difference]: Start difference. First operand 568 states and 780 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:16,697 INFO L93 Difference]: Finished difference Result 1222 states and 1714 transitions. [2023-12-15 22:17:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:17:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-12-15 22:17:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:16,702 INFO L225 Difference]: With dead ends: 1222 [2023-12-15 22:17:16,702 INFO L226 Difference]: Without dead ends: 887 [2023-12-15 22:17:16,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-12-15 22:17:16,703 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 173 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:16,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 301 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:17:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-12-15 22:17:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 847. [2023-12-15 22:17:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 607 states have (on average 1.299835255354201) internal successors, (789), 625 states have internal predecessors, (789), 188 states have call successors, (188), 51 states have call predecessors, (188), 51 states have return successors, (182), 170 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 22:17:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1159 transitions. [2023-12-15 22:17:16,855 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1159 transitions. Word has length 38 [2023-12-15 22:17:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:16,856 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1159 transitions. [2023-12-15 22:17:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 22:17:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1159 transitions. [2023-12-15 22:17:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 22:17:16,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:16,857 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:16,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:17,062 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 [2023-12-15 22:17:17,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:17,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2022990534, now seen corresponding path program 2 times [2023-12-15 22:17:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:17,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045043584] [2023-12-15 22:17:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:17,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:17,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907159589] [2023-12-15 22:17:17,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:17:17,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:17,080 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) [2023-12-15 22:17:17,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 22:17:17,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:17:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:17:17,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 22:17:17,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 22:17:17,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045043584] [2023-12-15 22:17:17,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:17,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907159589] [2023-12-15 22:17:17,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907159589] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:17,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:17,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:17:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282486688] [2023-12-15 22:17:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:17:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:17:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:17:17,153 INFO L87 Difference]: Start difference. First operand 847 states and 1159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:17,366 INFO L93 Difference]: Finished difference Result 1294 states and 1825 transitions. [2023-12-15 22:17:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:17:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-12-15 22:17:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:17,371 INFO L225 Difference]: With dead ends: 1294 [2023-12-15 22:17:17,371 INFO L226 Difference]: Without dead ends: 990 [2023-12-15 22:17:17,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-15 22:17:17,372 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:17,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 170 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-12-15 22:17:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 812. [2023-12-15 22:17:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 592 states have (on average 1.2939189189189189) internal successors, (766), 610 states have internal predecessors, (766), 168 states have call successors, (168), 51 states have call predecessors, (168), 51 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2023-12-15 22:17:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1096 transitions. [2023-12-15 22:17:17,524 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1096 transitions. Word has length 39 [2023-12-15 22:17:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:17,524 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1096 transitions. [2023-12-15 22:17:17,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 22:17:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1096 transitions. [2023-12-15 22:17:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-15 22:17:17,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:17,525 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2023-12-15 22:17:17,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:17,731 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 [2023-12-15 22:17:17,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2023-12-15 22:17:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:17,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28514507] [2023-12-15 22:17:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:17,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:17,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:17,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623739919] [2023-12-15 22:17:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:17,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:17,748 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) [2023-12-15 22:17:17,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 22:17:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:17,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-15 22:17:17,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-15 22:17:18,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-15 22:17:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28514507] [2023-12-15 22:17:19,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623739919] [2023-12-15 22:17:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623739919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:19,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-15 22:17:19,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820111335] [2023-12-15 22:17:19,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-15 22:17:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-15 22:17:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-12-15 22:17:19,397 INFO L87 Difference]: Start difference. First operand 812 states and 1096 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-15 22:17:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:28,676 INFO L93 Difference]: Finished difference Result 1434 states and 1939 transitions. [2023-12-15 22:17:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 22:17:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2023-12-15 22:17:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:28,681 INFO L225 Difference]: With dead ends: 1434 [2023-12-15 22:17:28,681 INFO L226 Difference]: Without dead ends: 1073 [2023-12-15 22:17:28,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2023-12-15 22:17:28,683 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 269 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:28,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 618 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-15 22:17:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-12-15 22:17:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 941. [2023-12-15 22:17:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 698 states have (on average 1.2908309455587392) internal successors, (901), 711 states have internal predecessors, (901), 184 states have call successors, (184), 58 states have call predecessors, (184), 58 states have return successors, (180), 171 states have call predecessors, (180), 180 states have call successors, (180) [2023-12-15 22:17:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1265 transitions. [2023-12-15 22:17:28,924 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1265 transitions. Word has length 53 [2023-12-15 22:17:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:28,924 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1265 transitions. [2023-12-15 22:17:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-15 22:17:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1265 transitions. [2023-12-15 22:17:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-15 22:17:28,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:28,925 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:28,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:29,130 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 [2023-12-15 22:17:29,131 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:29,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2023-12-15 22:17:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354064130] [2023-12-15 22:17:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:29,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:29,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696897735] [2023-12-15 22:17:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:29,140 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) [2023-12-15 22:17:29,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 22:17:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:29,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 22:17:29,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 22:17:29,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 22:17:29,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:29,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354064130] [2023-12-15 22:17:29,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:29,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696897735] [2023-12-15 22:17:29,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696897735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:29,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-12-15 22:17:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057732590] [2023-12-15 22:17:29,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 22:17:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 22:17:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-12-15 22:17:29,426 INFO L87 Difference]: Start difference. First operand 941 states and 1265 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-15 22:17:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:30,213 INFO L93 Difference]: Finished difference Result 2071 states and 2895 transitions. [2023-12-15 22:17:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 22:17:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 59 [2023-12-15 22:17:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:30,222 INFO L225 Difference]: With dead ends: 2071 [2023-12-15 22:17:30,222 INFO L226 Difference]: Without dead ends: 2049 [2023-12-15 22:17:30,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:17:30,223 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 302 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:30,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 302 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:17:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2023-12-15 22:17:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1935. [2023-12-15 22:17:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1446 states have (on average 1.3042876901798064) internal successors, (1886), 1484 states have internal predecessors, (1886), 394 states have call successors, (394), 94 states have call predecessors, (394), 94 states have return successors, (387), 356 states have call predecessors, (387), 387 states have call successors, (387) [2023-12-15 22:17:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2667 transitions. [2023-12-15 22:17:30,781 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2667 transitions. Word has length 59 [2023-12-15 22:17:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:30,781 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2667 transitions. [2023-12-15 22:17:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-15 22:17:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2667 transitions. [2023-12-15 22:17:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-15 22:17:30,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:30,782 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:30,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:30,987 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 [2023-12-15 22:17:30,988 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:30,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -630218180, now seen corresponding path program 1 times [2023-12-15 22:17:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998535837] [2023-12-15 22:17:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:30,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:31,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:31,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512355228] [2023-12-15 22:17:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:31,007 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) [2023-12-15 22:17:31,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 22:17:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:31,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 22:17:31,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 22:17:31,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:17:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:31,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998535837] [2023-12-15 22:17:31,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:31,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512355228] [2023-12-15 22:17:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512355228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:17:31,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:17:31,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:17:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560200224] [2023-12-15 22:17:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:17:31,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:17:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:17:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:17:31,096 INFO L87 Difference]: Start difference. First operand 1935 states and 2667 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 22:17:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:31,628 INFO L93 Difference]: Finished difference Result 3373 states and 4721 transitions. [2023-12-15 22:17:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:17:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2023-12-15 22:17:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:31,636 INFO L225 Difference]: With dead ends: 3373 [2023-12-15 22:17:31,637 INFO L226 Difference]: Without dead ends: 2226 [2023-12-15 22:17:31,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:17:31,639 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:31,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:17:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-12-15 22:17:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2154. [2023-12-15 22:17:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 1570 states have (on average 1.3044585987261146) internal successors, (2048), 1608 states have internal predecessors, (2048), 489 states have call successors, (489), 94 states have call predecessors, (489), 94 states have return successors, (482), 451 states have call predecessors, (482), 482 states have call successors, (482) [2023-12-15 22:17:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3019 transitions. [2023-12-15 22:17:32,202 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3019 transitions. Word has length 68 [2023-12-15 22:17:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 3019 transitions. [2023-12-15 22:17:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 22:17:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3019 transitions. [2023-12-15 22:17:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-15 22:17:32,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:32,203 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:32,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-15 22:17:32,408 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 [2023-12-15 22:17:32,408 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:32,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1338199949, now seen corresponding path program 2 times [2023-12-15 22:17:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:32,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164336490] [2023-12-15 22:17:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:32,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:32,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:32,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434350812] [2023-12-15 22:17:32,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:17:32,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:32,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:32,416 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) [2023-12-15 22:17:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 22:17:32,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:17:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:17:32,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-15 22:17:32,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-15 22:17:33,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:17:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-15 22:17:34,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:17:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164336490] [2023-12-15 22:17:34,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:17:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434350812] [2023-12-15 22:17:34,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434350812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:17:34,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:17:34,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-12-15 22:17:34,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303426041] [2023-12-15 22:17:34,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:17:34,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 22:17:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:17:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 22:17:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-12-15 22:17:34,615 INFO L87 Difference]: Start difference. First operand 2154 states and 3019 transitions. Second operand has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-15 22:17:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:17:48,603 INFO L93 Difference]: Finished difference Result 2989 states and 4142 transitions. [2023-12-15 22:17:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-15 22:17:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2023-12-15 22:17:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:17:48,612 INFO L225 Difference]: With dead ends: 2989 [2023-12-15 22:17:48,612 INFO L226 Difference]: Without dead ends: 2983 [2023-12-15 22:17:48,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-12-15 22:17:48,614 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 438 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:17:48,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 813 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-15 22:17:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2023-12-15 22:17:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2664. [2023-12-15 22:17:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2005 states have (on average 1.3067331670822944) internal successors, (2620), 2047 states have internal predecessors, (2620), 538 states have call successors, (538), 121 states have call predecessors, (538), 120 states have return successors, (532), 495 states have call predecessors, (532), 532 states have call successors, (532) [2023-12-15 22:17:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3690 transitions. [2023-12-15 22:17:49,375 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3690 transitions. Word has length 70 [2023-12-15 22:17:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:17:49,375 INFO L495 AbstractCegarLoop]: Abstraction has 2664 states and 3690 transitions. [2023-12-15 22:17:49,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-15 22:17:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3690 transitions. [2023-12-15 22:17:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-15 22:17:49,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:17:49,377 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:17:49,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-15 22:17:49,579 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 [2023-12-15 22:17:49,579 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:17:49,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:17:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2033330143, now seen corresponding path program 1 times [2023-12-15 22:17:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:17:49,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190122958] [2023-12-15 22:17:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:49,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:17:49,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:17:49,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951754615] [2023-12-15 22:17:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:17:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:17:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:17:49,590 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) [2023-12-15 22:17:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 22:17:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:17:49,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-15 22:17:49,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:17:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-15 22:17:50,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:18:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-15 22:18:00,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:18:00,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190122958] [2023-12-15 22:18:00,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:18:00,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951754615] [2023-12-15 22:18:00,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951754615] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:18:00,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:18:00,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-15 22:18:00,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694105069] [2023-12-15 22:18:00,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:18:00,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-15 22:18:00,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:18:00,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-15 22:18:00,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 22:18:00,347 INFO L87 Difference]: Start difference. First operand 2664 states and 3690 transitions. Second operand has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Received shutdown request... [2023-12-15 22:18:08,771 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:18:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-15 22:18:08,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=488, Invalid=2374, Unknown=0, NotChecked=0, Total=2862 [2023-12-15 22:18:08,798 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 183 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-15 22:18:08,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 533 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-15 22:18:08,799 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:18:08,808 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:18:08,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 22:18:09,005 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 [2023-12-15 22:18:09,006 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (2664states) and FLOYD_HOARE automaton (currently 29 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-8-4-1 term,while SimplifyDDA2 was simplifying 4 xjuncts wrt. a ∧-7-4-1 context. [2023-12-15 22:18:09,010 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:18:09,012 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:18:09,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:18:09 BoogieIcfgContainer [2023-12-15 22:18:09,013 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:18:09,014 INFO L158 Benchmark]: Toolchain (without parser) took 67542.78ms. Allocated memory was 191.9MB in the beginning and 519.0MB in the end (delta: 327.2MB). Free memory was 130.0MB in the beginning and 409.0MB in the end (delta: -278.9MB). Peak memory consumption was 49.5MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,014 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:18:09,014 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.63ms. Allocated memory is still 191.9MB. Free memory was 130.0MB in the beginning and 118.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,015 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.92ms. Allocated memory is still 191.9MB. Free memory was 118.5MB in the beginning and 116.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,015 INFO L158 Benchmark]: Boogie Preprocessor took 37.75ms. Allocated memory is still 191.9MB. Free memory was 116.7MB in the beginning and 114.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,015 INFO L158 Benchmark]: RCFGBuilder took 281.31ms. Allocated memory was 191.9MB in the beginning and 271.6MB in the end (delta: 79.7MB). Free memory was 114.8MB in the beginning and 230.2MB in the end (delta: -115.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,016 INFO L158 Benchmark]: TraceAbstraction took 66977.72ms. Allocated memory was 271.6MB in the beginning and 519.0MB in the end (delta: 247.5MB). Free memory was 229.7MB in the beginning and 409.0MB in the end (delta: -179.3MB). Peak memory consumption was 67.9MB. Max. memory is 8.0GB. [2023-12-15 22:18:09,018 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 191.9MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.63ms. Allocated memory is still 191.9MB. Free memory was 130.0MB in the beginning and 118.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.92ms. Allocated memory is still 191.9MB. Free memory was 118.5MB in the beginning and 116.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.75ms. Allocated memory is still 191.9MB. Free memory was 116.7MB in the beginning and 114.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 281.31ms. Allocated memory was 191.9MB in the beginning and 271.6MB in the end (delta: 79.7MB). Free memory was 114.8MB in the beginning and 230.2MB in the end (delta: -115.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * TraceAbstraction took 66977.72ms. Allocated memory was 271.6MB in the beginning and 519.0MB in the end (delta: 247.5MB). Free memory was 229.7MB in the beginning and 409.0MB in the end (delta: -179.3MB). Peak memory consumption was 67.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (2664states) and FLOYD_HOARE automaton (currently 29 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-8-4-1 term,while SimplifyDDA2 was simplifying 4 xjuncts wrt. a ∧-7-4-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.9s, OverallIterations: 21, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 37.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2420 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2365 mSDsluCounter, 5553 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4767 mSDsCounter, 943 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3593 IncrementalHoareTripleChecker+Invalid, 4536 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 943 mSolverCounterUnsat, 786 mSDtfsCounter, 3593 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1428 GetRequests, 1054 SyntacticMatches, 6 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 31.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2664occurred in iteration=20, InterpolantAutomatonStates: 267, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 20 MinimizatonAttempts, 1013 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 817 NumberOfCodeBlocks, 817 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1265 ConstructedInterpolants, 6 QuantifiedInterpolants, 9876 SizeOfPredicates, 85 NumberOfNonLiveVariables, 2723 ConjunctsInSsa, 432 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 796/1063 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown