/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:10:48,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:10:48,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 05:10:48,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:10:48,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:10:48,628 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:10:48,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:10:48,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:10:48,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:10:48,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:10:48,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:10:48,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:10:48,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:10:48,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:10:48,636 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:10:48,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:10:48,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:10:48,637 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:10:48,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:10:48,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:10:48,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:10:48,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:10:48,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:10:48,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:10:48,638 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:10:48,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:10:48,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:10:48,639 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:10:48,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:10:48,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:10:48,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:10:48,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:10:48,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:10:48,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:10:48,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:10:48,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:10:48,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:10:48,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:10:48,892 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:10:48,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2023-12-16 05:10:50,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:10:50,273 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:10:50,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2023-12-16 05:10:50,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ecb3c93/f977b29e271b41c08cf28731df001fbe/FLAGb4e220fed [2023-12-16 05:10:50,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ecb3c93/f977b29e271b41c08cf28731df001fbe [2023-12-16 05:10:50,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:10:50,293 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:10:50,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:10:50,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:10:50,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:10:50,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff376fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50, skipping insertion in model container [2023-12-16 05:10:50,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,322 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:10:50,465 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/hard-ll_valuebound50.c[538,551] [2023-12-16 05:10:50,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:10:50,490 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:10:50,498 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/hard-ll_valuebound50.c[538,551] [2023-12-16 05:10:50,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:10:50,518 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:10:50,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50 WrapperNode [2023-12-16 05:10:50,519 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:10:50,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:10:50,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:10:50,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:10:50,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,545 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-12-16 05:10:50,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:10:50,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:10:50,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:10:50,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:10:50,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,559 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,568 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]. [2023-12-16 05:10:50,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,575 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:10:50,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:10:50,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:10:50,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:10:50,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (1/1) ... [2023-12-16 05:10:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:10:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:10:50,621 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) [2023-12-16 05:10:50,629 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 [2023-12-16 05:10:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:10:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-16 05:10:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-16 05:10:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:10:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:10:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:10:50,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 05:10:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 05:10:50,707 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:10:50,709 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:10:50,887 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:10:50,904 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:10:50,904 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 05:10:50,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:10:50 BoogieIcfgContainer [2023-12-16 05:10:50,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:10:50,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:10:50,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:10:50,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:10:50,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:10:50" (1/3) ... [2023-12-16 05:10:50,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5810c4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:10:50, skipping insertion in model container [2023-12-16 05:10:50,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:10:50" (2/3) ... [2023-12-16 05:10:50,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5810c4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:10:50, skipping insertion in model container [2023-12-16 05:10:50,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:10:50" (3/3) ... [2023-12-16 05:10:50,919 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2023-12-16 05:10:50,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:10:50,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:10:50,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:10:50,981 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;@1938b7a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:10:50,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:10:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-16 05:10:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-16 05:10:50,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:50,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:50,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:50,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2023-12-16 05:10:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:51,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345384060] [2023-12-16 05:10:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:10:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-16 05:10:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-16 05:10:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 05:10:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345384060] [2023-12-16 05:10:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345384060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:10:51,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:10:51,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 05:10:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641419746] [2023-12-16 05:10:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:10:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 05:10:51,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 05:10:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 05:10:51,217 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:10:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:51,256 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2023-12-16 05:10:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 05:10:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-16 05:10:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:51,264 INFO L225 Difference]: With dead ends: 58 [2023-12-16 05:10:51,264 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 05:10:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 05:10:51,272 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2023-12-16 05:10:51,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:10:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 05:10:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-16 05:10:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 05:10:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-12-16 05:10:51,312 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2023-12-16 05:10:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:51,312 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-12-16 05:10:51,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:10:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-12-16 05:10:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-16 05:10:51,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:51,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:51,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 05:10:51,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:51,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2023-12-16 05:10:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550881289] [2023-12-16 05:10:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:10:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-16 05:10:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-16 05:10:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 05:10:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550881289] [2023-12-16 05:10:51,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550881289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:10:51,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:10:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:10:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363179452] [2023-12-16 05:10:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:10:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:10:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:10:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:10:51,500 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 05:10:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:51,550 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-12-16 05:10:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 05:10:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-12-16 05:10:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:51,552 INFO L225 Difference]: With dead ends: 41 [2023-12-16 05:10:51,552 INFO L226 Difference]: Without dead ends: 39 [2023-12-16 05:10:51,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:10:51,554 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:10:51,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:10:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-16 05:10:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-12-16 05:10:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 05:10:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-16 05:10:51,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2023-12-16 05:10:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:51,565 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-16 05:10:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 05:10:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-16 05:10:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-16 05:10:51,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:51,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 05:10:51,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:51,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2023-12-16 05:10:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:51,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456353493] [2023-12-16 05:10:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:10:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-16 05:10:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-16 05:10:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 05:10:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 05:10:51,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456353493] [2023-12-16 05:10:51,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456353493] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:10:51,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:10:51,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:10:51,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525052437] [2023-12-16 05:10:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:10:51,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:10:51,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:10:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:10:51,720 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:10:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:51,792 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-12-16 05:10:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 05:10:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-12-16 05:10:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:51,794 INFO L225 Difference]: With dead ends: 45 [2023-12-16 05:10:51,794 INFO L226 Difference]: Without dead ends: 43 [2023-12-16 05:10:51,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:10:51,796 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:10:51,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:10:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-16 05:10:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2023-12-16 05:10:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 05:10:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-12-16 05:10:51,892 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2023-12-16 05:10:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:51,893 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-12-16 05:10:51,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:10:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-12-16 05:10:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-16 05:10:51,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:51,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 05:10:51,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2023-12-16 05:10:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:51,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888937596] [2023-12-16 05:10:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:52,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:10:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626953910] [2023-12-16 05:10:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:52,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:10:52,077 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) [2023-12-16 05:10:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 05:10:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:52,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 05:10:52,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:10:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-16 05:10:52,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:10:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-16 05:10:52,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888937596] [2023-12-16 05:10:52,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:10:52,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626953910] [2023-12-16 05:10:52,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626953910] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:10:52,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:10:52,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-16 05:10:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712150602] [2023-12-16 05:10:52,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:10:52,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:10:52,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:10:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-16 05:10:52,693 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 05:10:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:53,003 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2023-12-16 05:10:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 05:10:53,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 33 [2023-12-16 05:10:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:53,007 INFO L225 Difference]: With dead ends: 71 [2023-12-16 05:10:53,007 INFO L226 Difference]: Without dead ends: 56 [2023-12-16 05:10:53,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-16 05:10:53,009 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:10:53,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 105 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:10:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-16 05:10:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-12-16 05:10:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-16 05:10:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-12-16 05:10:53,023 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 33 [2023-12-16 05:10:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:53,023 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-12-16 05:10:53,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 05:10:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-12-16 05:10:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-16 05:10:53,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:53,025 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:53,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 05:10:53,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:53,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:53,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2023-12-16 05:10:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:53,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436213579] [2023-12-16 05:10:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:53,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:53,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:10:53,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465453843] [2023-12-16 05:10:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:53,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:53,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:10:53,251 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) [2023-12-16 05:10:53,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 05:10:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:53,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-16 05:10:53,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:10:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-16 05:10:53,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:10:53,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:53,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436213579] [2023-12-16 05:10:53,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:10:53,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465453843] [2023-12-16 05:10:53,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465453843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:10:53,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:10:53,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-16 05:10:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969472291] [2023-12-16 05:10:53,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:10:53,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-16 05:10:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-16 05:10:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-16 05:10:53,559 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:10:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:53,728 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-12-16 05:10:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 05:10:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2023-12-16 05:10:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:53,730 INFO L225 Difference]: With dead ends: 66 [2023-12-16 05:10:53,730 INFO L226 Difference]: Without dead ends: 55 [2023-12-16 05:10:53,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-16 05:10:53,731 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:10:53,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:10:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-16 05:10:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-16 05:10:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-16 05:10:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-12-16 05:10:53,748 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 40 [2023-12-16 05:10:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:53,749 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-12-16 05:10:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:10:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-12-16 05:10:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-16 05:10:53,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:53,750 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-12-16 05:10:53,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 05:10:53,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:53,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:53,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2057146835, now seen corresponding path program 1 times [2023-12-16 05:10:53,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:53,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935929318] [2023-12-16 05:10:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:53,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:53,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:10:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514490607] [2023-12-16 05:10:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:53,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:53,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:10:53,981 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) [2023-12-16 05:10:54,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 05:10:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:54,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-16 05:10:54,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:10:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-16 05:10:54,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:10:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-16 05:10:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935929318] [2023-12-16 05:10:54,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:10:54,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514490607] [2023-12-16 05:10:54,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514490607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:10:54,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:10:54,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-12-16 05:10:54,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683020352] [2023-12-16 05:10:54,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:10:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 05:10:54,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 05:10:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-16 05:10:54,694 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-12-16 05:10:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:10:55,065 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2023-12-16 05:10:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-16 05:10:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 57 [2023-12-16 05:10:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:10:55,067 INFO L225 Difference]: With dead ends: 96 [2023-12-16 05:10:55,067 INFO L226 Difference]: Without dead ends: 92 [2023-12-16 05:10:55,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:10:55,068 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:10:55,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 306 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:10:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-16 05:10:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2023-12-16 05:10:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 54 states have internal predecessors, (59), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-16 05:10:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2023-12-16 05:10:55,090 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 57 [2023-12-16 05:10:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:10:55,090 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2023-12-16 05:10:55,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-12-16 05:10:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2023-12-16 05:10:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-16 05:10:55,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:10:55,093 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:10:55,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 05:10:55,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:55,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:10:55,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:10:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2023-12-16 05:10:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:10:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114310713] [2023-12-16 05:10:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:10:55,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:10:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518571980] [2023-12-16 05:10:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:10:55,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:10:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:10:55,311 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) [2023-12-16 05:10:55,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 05:10:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:10:55,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-16 05:10:55,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:10:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-12-16 05:10:55,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:10:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-12-16 05:10:58,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:10:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114310713] [2023-12-16 05:10:58,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:10:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518571980] [2023-12-16 05:10:58,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518571980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:10:58,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:10:58,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-12-16 05:10:58,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120892650] [2023-12-16 05:10:58,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:10:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-16 05:10:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:10:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-16 05:10:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-12-16 05:10:58,349 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-12-16 05:11:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:11:03,534 INFO L93 Difference]: Finished difference Result 148 states and 197 transitions. [2023-12-16 05:11:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-16 05:11:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 70 [2023-12-16 05:11:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:11:03,537 INFO L225 Difference]: With dead ends: 148 [2023-12-16 05:11:03,537 INFO L226 Difference]: Without dead ends: 127 [2023-12-16 05:11:03,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-12-16 05:11:03,538 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:11:03,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 249 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-16 05:11:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-16 05:11:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2023-12-16 05:11:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 63 states have internal predecessors, (71), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-16 05:11:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2023-12-16 05:11:03,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 70 [2023-12-16 05:11:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:11:03,569 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2023-12-16 05:11:03,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-12-16 05:11:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2023-12-16 05:11:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-16 05:11:03,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:11:03,571 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:11:03,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 05:11:03,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:03,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:11:03,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:11:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1411586487, now seen corresponding path program 1 times [2023-12-16 05:11:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:11:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080537348] [2023-12-16 05:11:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:11:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:11:03,791 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:11:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338223960] [2023-12-16 05:11:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:11:03,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:03,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:11:03,793 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) [2023-12-16 05:11:03,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 05:11:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:11:03,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-16 05:11:03,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:11:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-12-16 05:11:04,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:11:04,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:11:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080537348] [2023-12-16 05:11:04,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:11:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338223960] [2023-12-16 05:11:04,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338223960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:11:04,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:11:04,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-16 05:11:04,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665666749] [2023-12-16 05:11:04,320 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:11:04,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:11:04,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:11:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:11:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:11:04,321 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-16 05:11:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:11:04,772 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2023-12-16 05:11:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:11:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2023-12-16 05:11:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:11:04,774 INFO L225 Difference]: With dead ends: 113 [2023-12-16 05:11:04,774 INFO L226 Difference]: Without dead ends: 104 [2023-12-16 05:11:04,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-12-16 05:11:04,803 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:11:04,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 328 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 05:11:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-16 05:11:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-12-16 05:11:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-16 05:11:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2023-12-16 05:11:04,835 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 81 [2023-12-16 05:11:04,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:11:04,836 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2023-12-16 05:11:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-16 05:11:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2023-12-16 05:11:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-16 05:11:04,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:11:04,837 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:11:04,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 05:11:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:05,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:11:05,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:11:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash -302279341, now seen corresponding path program 2 times [2023-12-16 05:11:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:11:05,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506361524] [2023-12-16 05:11:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:11:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:11:05,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:11:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909380156] [2023-12-16 05:11:05,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:11:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:11:05,063 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) [2023-12-16 05:11:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 05:11:05,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:11:05,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:11:05,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-16 05:11:05,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:11:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-12-16 05:11:05,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:11:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-12-16 05:11:05,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:11:05,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506361524] [2023-12-16 05:11:05,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:11:05,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909380156] [2023-12-16 05:11:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909380156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:11:05,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:11:05,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-12-16 05:11:05,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74363343] [2023-12-16 05:11:05,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:11:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:11:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:11:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:11:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:11:05,223 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-16 05:11:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:11:05,288 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2023-12-16 05:11:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 05:11:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 83 [2023-12-16 05:11:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:11:05,292 INFO L225 Difference]: With dead ends: 129 [2023-12-16 05:11:05,293 INFO L226 Difference]: Without dead ends: 99 [2023-12-16 05:11:05,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:11:05,295 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:11:05,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:11:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-16 05:11:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-16 05:11:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 62 states have internal predecessors, (68), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-16 05:11:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2023-12-16 05:11:05,330 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 83 [2023-12-16 05:11:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:11:05,331 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2023-12-16 05:11:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-16 05:11:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2023-12-16 05:11:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-16 05:11:05,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:11:05,338 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:11:05,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 05:11:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:05,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:11:05,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:11:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1209712204, now seen corresponding path program 3 times [2023-12-16 05:11:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:11:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891039870] [2023-12-16 05:11:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:11:05,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:11:05,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:11:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195311622] [2023-12-16 05:11:05,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 05:11:05,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:11:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:11:05,559 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) [2023-12-16 05:11:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 05:11:05,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 05:11:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:11:05,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-16 05:11:05,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:11:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-16 05:11:06,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:11:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-16 05:11:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:11:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891039870] [2023-12-16 05:11:45,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:11:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195311622] [2023-12-16 05:11:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195311622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:11:45,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:11:45,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-12-16 05:11:45,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457007452] [2023-12-16 05:11:45,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:11:45,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 05:11:45,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:11:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 05:11:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-16 05:11:45,683 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Received shutdown request... [2023-12-16 05:11:58,576 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 [2023-12-16 05:11:58,602 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:11:59,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 05:11:59,778 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-16 05:11:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 05:11:59,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-12-16 05:11:59,785 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-16 05:11:59,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 218 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-16 05:11:59,787 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:11:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-16 05:11:59,787 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (99states) and FLOYD_HOARE automaton (currently 10 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-16 05:11:59,790 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:11:59,792 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:11:59,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:11:59 BoogieIcfgContainer [2023-12-16 05:11:59,794 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:11:59,794 INFO L158 Benchmark]: Toolchain (without parser) took 69501.22ms. Allocated memory was 277.9MB in the beginning and 351.3MB in the end (delta: 73.4MB). Free memory was 229.9MB in the beginning and 249.4MB in the end (delta: -19.6MB). Peak memory consumption was 54.3MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,795 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 155.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:11:59,795 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.00ms. Allocated memory is still 277.9MB. Free memory was 229.9MB in the beginning and 218.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.75ms. Allocated memory is still 277.9MB. Free memory was 218.8MB in the beginning and 216.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,795 INFO L158 Benchmark]: Boogie Preprocessor took 31.43ms. Allocated memory is still 277.9MB. Free memory was 216.8MB in the beginning and 215.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,795 INFO L158 Benchmark]: RCFGBuilder took 326.70ms. Allocated memory is still 277.9MB. Free memory was 215.2MB in the beginning and 202.1MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,796 INFO L158 Benchmark]: TraceAbstraction took 68880.76ms. Allocated memory was 277.9MB in the beginning and 351.3MB in the end (delta: 73.4MB). Free memory was 201.5MB in the beginning and 249.4MB in the end (delta: -47.9MB). Peak memory consumption was 26.0MB. Max. memory is 8.0GB. [2023-12-16 05:11:59,797 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 203.4MB. Free memory is still 155.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 223.00ms. Allocated memory is still 277.9MB. Free memory was 229.9MB in the beginning and 218.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.75ms. Allocated memory is still 277.9MB. Free memory was 218.8MB in the beginning and 216.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.43ms. Allocated memory is still 277.9MB. Free memory was 216.8MB in the beginning and 215.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 326.70ms. Allocated memory is still 277.9MB. Free memory was 215.2MB in the beginning and 202.1MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 68880.76ms. Allocated memory was 277.9MB in the beginning and 351.3MB in the end (delta: 73.4MB). Free memory was 201.5MB in the beginning and 249.4MB in the end (delta: -47.9MB). Peak memory consumption was 26.0MB. 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: 17]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 17). Cancelled while NwaCegarLoop was constructing difference of abstraction (99states) and FLOYD_HOARE automaton (currently 10 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 68.8s, OverallIterations: 10, TraceHistogramMax: 14, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 286 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 254 mSDsluCounter, 1732 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1424 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1381 IncrementalHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 308 mSDtfsCounter, 1381 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 883 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=8, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 50 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 45.3s InterpolantComputationTime, 538 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 866 ConstructedInterpolants, 0 QuantifiedInterpolants, 16255 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1006 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 1894/2001 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 [2023-12-16 05:11:59,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown