/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:50:59,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:50:59,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:50:59,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:50:59,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:50:59,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:50:59,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:50:59,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:50:59,669 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:50:59,671 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:50:59,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:50:59,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:50:59,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:50:59,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:50:59,674 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:50:59,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:50:59,674 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:50:59,674 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:50:59,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:50:59,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:50:59,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:50:59,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:50:59,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:50:59,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:50:59,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:50:59,677 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:50:59,677 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:50:59,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:50:59,678 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:50:59,679 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:50:59,679 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:50:59,679 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:50:59,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:50:59,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:50:59,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:50:59,883 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:50:59,883 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:50:59,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin.i [2023-12-19 18:51:00,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:51:01,061 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:51:01,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i [2023-12-19 18:51:01,066 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/524924896/1ce6171dc49e4cf2aec85c938a083e52/FLAGeaf1e2ba8 [2023-12-19 18:51:01,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/524924896/1ce6171dc49e4cf2aec85c938a083e52 [2023-12-19 18:51:01,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:51:01,080 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:51:01,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:51:01,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:51:01,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:51:01,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f50c545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01, skipping insertion in model container [2023-12-19 18:51:01,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,101 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:51:01,190 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/divbin.i[950,963] [2023-12-19 18:51:01,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:51:01,204 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:51:01,213 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/divbin.i[950,963] [2023-12-19 18:51:01,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:51:01,239 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:51:01,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01 WrapperNode [2023-12-19 18:51:01,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:51:01,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:51:01,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:51:01,240 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:51:01,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,258 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-12-19 18:51:01,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:51:01,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:51:01,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:51:01,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:51:01,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,276 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,283 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 18:51:01,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:51:01,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:51:01,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:51:01,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:51:01,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (1/1) ... [2023-12-19 18:51:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:51:01,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:01,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 18:51:01,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 18:51:01,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:51:01,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 18:51:01,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 18:51:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:51:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:51:01,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:51:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 18:51:01,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 18:51:01,389 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:51:01,390 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:51:01,488 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:51:01,501 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:51:01,501 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 18:51:01,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:51:01 BoogieIcfgContainer [2023-12-19 18:51:01,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:51:01,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:51:01,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:51:01,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:51:01,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:51:01" (1/3) ... [2023-12-19 18:51:01,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0dfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:51:01, skipping insertion in model container [2023-12-19 18:51:01,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:51:01" (2/3) ... [2023-12-19 18:51:01,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0dfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:51:01, skipping insertion in model container [2023-12-19 18:51:01,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:51:01" (3/3) ... [2023-12-19 18:51:01,510 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin.i [2023-12-19 18:51:01,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:51:01,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:51:01,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:51:01,552 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;@6c859f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:51:01,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:51:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:51:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-19 18:51:01,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:01,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:01,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:01,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:01,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2077086955, now seen corresponding path program 1 times [2023-12-19 18:51:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090602112] [2023-12-19 18:51:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090602112] [2023-12-19 18:51:01,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 18:51:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645609999] [2023-12-19 18:51:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:01,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:01,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:01,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:01,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:51:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 18:51:01,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:51:01,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:51:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645609999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:51:01,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:51:01,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 18:51:01,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954718914] [2023-12-19 18:51:01,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:51:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 18:51:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 18:51:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:51:01,758 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:51:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:01,779 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2023-12-19 18:51:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 18:51:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-19 18:51:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:01,785 INFO L225 Difference]: With dead ends: 44 [2023-12-19 18:51:01,785 INFO L226 Difference]: Without dead ends: 21 [2023-12-19 18:51:01,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:51:01,790 INFO L413 NwaCegarLoop]: 25 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, 25 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:01,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:51:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-19 18:51:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-19 18:51:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 18:51:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-19 18:51:01,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2023-12-19 18:51:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:01,817 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-19 18:51:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:51:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-19 18:51:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-19 18:51:01,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:01,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:01,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:02,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 18:51:02,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:02,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1665632571, now seen corresponding path program 1 times [2023-12-19 18:51:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:02,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732527857] [2023-12-19 18:51:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:02,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:02,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328721784] [2023-12-19 18:51:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:02,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:02,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:51:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 18:51:02,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:51:02,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:51:02,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732527857] [2023-12-19 18:51:02,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328721784] [2023-12-19 18:51:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328721784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:51:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:51:02,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-19 18:51:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642389035] [2023-12-19 18:51:02,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:51:02,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 18:51:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 18:51:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:51:02,359 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:51:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:02,513 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-12-19 18:51:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 18:51:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-19 18:51:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:02,514 INFO L225 Difference]: With dead ends: 33 [2023-12-19 18:51:02,515 INFO L226 Difference]: Without dead ends: 30 [2023-12-19 18:51:02,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:51:02,517 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:02,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 88 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:51:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-19 18:51:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-19 18:51:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:51:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-12-19 18:51:02,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2023-12-19 18:51:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:02,530 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-12-19 18:51:02,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:51:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-12-19 18:51:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 18:51:02,530 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:02,531 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:02,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 18:51:02,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 18:51:02,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:02,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash -837726058, now seen corresponding path program 1 times [2023-12-19 18:51:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702207083] [2023-12-19 18:51:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:02,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:02,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:02,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288680705] [2023-12-19 18:51:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:02,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:02,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:02,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:02,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:51:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:51:02,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:51:02,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:51:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702207083] [2023-12-19 18:51:03,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288680705] [2023-12-19 18:51:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288680705] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:03,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:51:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-12-19 18:51:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201803645] [2023-12-19 18:51:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:51:03,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:51:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:51:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:51:03,081 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:51:07,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 18:51:11,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 18:51:15,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 18:51:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:15,201 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-12-19 18:51:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:51:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-12-19 18:51:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:15,202 INFO L225 Difference]: With dead ends: 44 [2023-12-19 18:51:15,202 INFO L226 Difference]: Without dead ends: 42 [2023-12-19 18:51:15,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:51:15,203 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:15,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2023-12-19 18:51:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-19 18:51:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-12-19 18:51:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 18:51:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-12-19 18:51:15,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2023-12-19 18:51:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:15,213 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-12-19 18:51:15,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:51:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-12-19 18:51:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 18:51:15,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:15,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:15,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 18:51:15,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:15,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:15,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash -974634146, now seen corresponding path program 1 times [2023-12-19 18:51:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235663152] [2023-12-19 18:51:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:15,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307083645] [2023-12-19 18:51:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:15,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:15,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:15,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:51:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:15,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 18:51:15,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:51:15,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:51:15,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:15,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235663152] [2023-12-19 18:51:15,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307083645] [2023-12-19 18:51:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307083645] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:51:15,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:51:15,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:51:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081554174] [2023-12-19 18:51:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:51:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:51:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:51:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:51:15,502 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:51:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:15,523 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-12-19 18:51:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:51:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-19 18:51:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:15,525 INFO L225 Difference]: With dead ends: 47 [2023-12-19 18:51:15,526 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 18:51:15,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:51:15,528 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:15,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:51:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 18:51:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 18:51:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:51:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-19 18:51:15,544 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 27 [2023-12-19 18:51:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:15,544 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-19 18:51:15,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:51:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-19 18:51:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 18:51:15,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:15,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:15,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:15,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:15,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:15,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1063315490, now seen corresponding path program 1 times [2023-12-19 18:51:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453074673] [2023-12-19 18:51:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:15,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442554824] [2023-12-19 18:51:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:15,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:15,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:51:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:15,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 18:51:15,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:51:15,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:51:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453074673] [2023-12-19 18:51:15,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442554824] [2023-12-19 18:51:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442554824] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:15,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:51:15,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-12-19 18:51:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836384085] [2023-12-19 18:51:15,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:15,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 18:51:15,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 18:51:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:51:15,903 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-19 18:51:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:15,976 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-12-19 18:51:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:51:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-12-19 18:51:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:15,977 INFO L225 Difference]: With dead ends: 35 [2023-12-19 18:51:15,977 INFO L226 Difference]: Without dead ends: 28 [2023-12-19 18:51:15,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:51:15,978 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:15,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:51:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-19 18:51:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-19 18:51:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:51:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-12-19 18:51:15,986 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 27 [2023-12-19 18:51:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:15,986 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-12-19 18:51:15,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-19 18:51:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-12-19 18:51:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:51:15,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:15,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:15,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-19 18:51:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:16,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:16,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1045331897, now seen corresponding path program 1 times [2023-12-19 18:51:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300119025] [2023-12-19 18:51:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:16,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:16,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584013513] [2023-12-19 18:51:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:16,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:51:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:16,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 18:51:16,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:51:16,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:26,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300119025] [2023-12-19 18:51:26,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584013513] [2023-12-19 18:51:26,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584013513] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:26,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:51:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-19 18:51:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279987931] [2023-12-19 18:51:26,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 18:51:26,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 18:51:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=171, Unknown=2, NotChecked=0, Total=210 [2023-12-19 18:51:26,964 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:51:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:27,119 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-12-19 18:51:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 18:51:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-19 18:51:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:27,120 INFO L225 Difference]: With dead ends: 41 [2023-12-19 18:51:27,120 INFO L226 Difference]: Without dead ends: 39 [2023-12-19 18:51:27,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=76, Invalid=342, Unknown=2, NotChecked=0, Total=420 [2023-12-19 18:51:27,121 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:27,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:51:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-19 18:51:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-12-19 18:51:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 18:51:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-12-19 18:51:27,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 29 [2023-12-19 18:51:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:27,128 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-12-19 18:51:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:51:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-12-19 18:51:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 18:51:27,128 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:27,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:27,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:27,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:27,334 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:27,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -146285604, now seen corresponding path program 2 times [2023-12-19 18:51:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319358441] [2023-12-19 18:51:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:27,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:27,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392492823] [2023-12-19 18:51:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:51:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:27,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:27,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:51:27,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:51:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:27,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 18:51:27,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:51:27,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 18:51:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319358441] [2023-12-19 18:51:28,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:51:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392492823] [2023-12-19 18:51:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392492823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:28,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:51:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-19 18:51:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8943040] [2023-12-19 18:51:28,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:28,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 18:51:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 18:51:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:51:28,356 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 18:51:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:29,081 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-12-19 18:51:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 18:51:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2023-12-19 18:51:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:29,082 INFO L225 Difference]: With dead ends: 73 [2023-12-19 18:51:29,082 INFO L226 Difference]: Without dead ends: 43 [2023-12-19 18:51:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-12-19 18:51:29,083 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:29,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 125 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 18:51:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-19 18:51:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-12-19 18:51:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 18:51:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-12-19 18:51:29,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2023-12-19 18:51:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:29,090 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-12-19 18:51:29,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 18:51:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-12-19 18:51:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 18:51:29,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:29,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:29,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 18:51:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:29,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:29,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 794731127, now seen corresponding path program 3 times [2023-12-19 18:51:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:29,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779843224] [2023-12-19 18:51:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:29,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:51:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866120905] [2023-12-19 18:51:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:51:29,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:29,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:51:29,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:51:36,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:51:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:36,429 WARN L260 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-19 18:51:36,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:52:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:52:03,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:52:41,849 WARN L293 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:53:48,383 WARN L293 SmtUtils]: Spent 17.50s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:54:15,876 WARN L293 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 18:54:24,021 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse5 (div .cse6 2))) (let ((.cse1 (mod .cse5 4294967296))) (let ((.cse3 (div .cse1 2)) (.cse2 (* 4294967295 .cse5)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (< .cse0 .cse1) (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) (mod .cse3 4294967296)) (not (= .cse4 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse5 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse4)) (= (mod (+ (* .cse3 2) |c_ULTIMATE.start_main_~r~0#1| (* .cse3 4 |c_ULTIMATE.start_main_~q~0#1|) .cse2) 4294967296) .cse4) (< .cse6 (+ .cse0 1)) (= .cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))))))) is different from true [2023-12-19 18:55:55,905 WARN L293 SmtUtils]: Spent 11.56s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:56:06,317 WARN L293 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 18:56:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 2 not checked. [2023-12-19 18:56:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:56:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779843224] [2023-12-19 18:56:12,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:56:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866120905] [2023-12-19 18:56:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866120905] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:56:12,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:56:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2023-12-19 18:56:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850981519] [2023-12-19 18:56:12,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:56:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 18:56:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:56:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 18:56:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=620, Unknown=10, NotChecked=52, Total=812 [2023-12-19 18:56:12,702 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 24 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 18:56:15,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:20,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:28,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:29,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:31,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:33,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:37,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:38,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:44,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:48,838 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse19 (div .cse5 2))) (let ((.cse18 (mod .cse19 4294967296)) (.cse20 (* 2 .cse19 |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse14 (= .cse10 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (.cse13 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse16 (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse20) 4294967296) .cse10)) (.cse23 (* 4294967295 .cse19)) (.cse22 (div .cse18 2)) (.cse21 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse6 (+ .cse21 1)) (.cse1 (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse23) 4294967296) (mod .cse22 4294967296))) (.cse3 (not .cse16)) (.cse4 (= (mod (+ (* .cse22 2) |c_ULTIMATE.start_main_~r~0#1| (* .cse22 4 |c_ULTIMATE.start_main_~q~0#1|) .cse23) 4294967296) .cse10)) (.cse7 (= .cse18 .cse13)) (.cse0 (< .cse21 .cse18)) (.cse15 (= .cse5 .cse13)) (.cse11 (< .cse21 .cse5)) (.cse2 (not .cse14))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4 (< .cse5 .cse6) .cse7) (let ((.cse12 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse8 (* 4294967295 .cse12)) (.cse9 (div .cse12 2))) (or (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse8) 4294967296) (mod .cse9 4294967296)) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse10)) .cse11 (= .cse10 (mod (+ (* .cse9 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| .cse8 (* 2 .cse9)) 4294967296)) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse12 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse10)) (< (* 2 .cse12) .cse6) (= .cse13 .cse12)))) (or .cse0 .cse1 .cse2 .cse3 .cse4 .cse7) .cse14 (<= 1 .cse13) (<= .cse13 2147483646) (or .cse15 .cse0 .cse16) (let ((.cse17 (* 4294967295 |c_ULTIMATE.start_main_~b~0#1|))) (or .cse15 .cse11 .cse2 (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse17) 4294967296) .cse18) (= (mod (+ (* 2 .cse19) |c_ULTIMATE.start_main_~r~0#1| .cse20 .cse17) 4294967296) .cse10))))))))) is different from false [2023-12-19 18:56:52,856 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse7 (+ .cse0 1)) (.cse8 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (let ((.cse5 (div .cse6 2))) (let ((.cse1 (mod .cse5 4294967296))) (let ((.cse3 (div .cse1 2)) (.cse2 (* 4294967295 .cse5))) (or (< .cse0 .cse1) (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) (mod .cse3 4294967296)) (not (= .cse4 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse5 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse4)) (= (mod (+ (* .cse3 2) |c_ULTIMATE.start_main_~r~0#1| (* .cse3 4 |c_ULTIMATE.start_main_~q~0#1|) .cse2) 4294967296) .cse4) (< .cse6 .cse7) (= .cse1 .cse8))))) (let ((.cse11 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse9 (* 4294967295 .cse11)) (.cse10 (div .cse11 2))) (or (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse9) 4294967296) (mod .cse10 4294967296)) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse4)) (< .cse0 .cse6) (= .cse4 (mod (+ (* .cse10 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| .cse9 (* 2 .cse10)) 4294967296)) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse11 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse4)) (< (* 2 .cse11) .cse7) (= .cse8 .cse11))))))) is different from true [2023-12-19 18:56:54,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:58,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:04,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:31,525 WARN L293 SmtUtils]: Spent 11.65s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:57:35,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:39,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:43,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:46,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:51,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:55,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:58:00,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:01,556 WARN L293 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:00:05,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:09,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:12,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:13,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:23,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:00:26,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:00:30,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:00:33,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:44,397 WARN L293 SmtUtils]: Spent 56.36s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:01:47,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:51,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:09,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:10,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:14,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:16,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:20,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:24,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:28,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:29,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:31,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:33,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:38,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:43,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:44,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:45,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:49,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:51,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:56,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:02:59,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:02,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:19,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:23,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:27,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:28,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:33,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 19:03:37,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:03:38,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] Received shutdown request... [2023-12-19 19:05:44,374 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 19:05:44,374 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 19:05:45,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 19:05:45,575 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 [2023-12-19 19:05:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 19:05:45,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 412.6s TimeCoverageRelationStatistics Valid=254, Invalid=1219, Unknown=21, NotChecked=228, Total=1722 [2023-12-19 19:05:45,607 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 34 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 176.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:05:45,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 254 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 385 Invalid, 26 Unknown, 166 Unchecked, 176.1s Time] [2023-12-19 19:05:45,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 19:05:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-19 19:05:45,609 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (40states) and FLOYD_HOARE automaton (currently 31 states, 29 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-19 19:05:45,612 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-12-19 19:05:45,612 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 [2023-12-19 19:05:45,616 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 19:05:45,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 07:05:45 BoogieIcfgContainer [2023-12-19 19:05:45,619 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 19:05:45,620 INFO L158 Benchmark]: Toolchain (without parser) took 884540.09ms. Allocated memory is still 234.9MB. Free memory was 181.6MB in the beginning and 88.9MB in the end (delta: 92.7MB). Peak memory consumption was 94.7MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,620 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 195.0MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 19:05:45,620 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.46ms. Allocated memory is still 234.9MB. Free memory was 181.0MB in the beginning and 170.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.34ms. Allocated memory is still 234.9MB. Free memory was 170.0MB in the beginning and 169.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,621 INFO L158 Benchmark]: Boogie Preprocessor took 30.61ms. Allocated memory is still 234.9MB. Free memory was 169.0MB in the beginning and 166.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,622 INFO L158 Benchmark]: RCFGBuilder took 211.62ms. Allocated memory is still 234.9MB. Free memory was 166.9MB in the beginning and 155.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,624 INFO L158 Benchmark]: TraceAbstraction took 884113.38ms. Allocated memory is still 234.9MB. Free memory was 154.8MB in the beginning and 88.9MB in the end (delta: 65.9MB). Peak memory consumption was 67.5MB. Max. memory is 8.0GB. [2023-12-19 19:05:45,625 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 195.0MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 158.46ms. Allocated memory is still 234.9MB. Free memory was 181.0MB in the beginning and 170.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.34ms. Allocated memory is still 234.9MB. Free memory was 170.0MB in the beginning and 169.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.61ms. Allocated memory is still 234.9MB. Free memory was 169.0MB in the beginning and 166.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 211.62ms. Allocated memory is still 234.9MB. Free memory was 166.9MB in the beginning and 155.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 884113.38ms. Allocated memory is still 234.9MB. Free memory was 154.8MB in the beginning and 88.9MB in the end (delta: 65.9MB). Peak memory consumption was 67.5MB. 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: 21]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 21). Cancelled while NwaCegarLoop was constructing difference of abstraction (40states) and FLOYD_HOARE automaton (currently 31 states, 29 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 884.1s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 586.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 169 SdHoareTripleChecker+Valid, 189.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 803 SdHoareTripleChecker+Invalid, 188.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 166 IncrementalHoareTripleChecker+Unchecked, 658 mSDsCounter, 59 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 805 IncrementalHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 59 mSolverCounterUnsat, 145 mSDtfsCounter, 805 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 255 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 423.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 288.2s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 329 ConstructedInterpolants, 9 QuantifiedInterpolants, 3027 SizeOfPredicates, 25 NumberOfNonLiveVariables, 578 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 101/150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown