./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:54:18,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:54:18,446 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:54:18,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:54:18,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:54:18,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:54:18,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:54:18,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:54:18,481 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:54:18,481 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:54:18,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:54:18,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:54:18,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:54:18,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:54:18,483 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:54:18,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:54:18,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:54:18,484 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:54:18,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:54:18,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:54:18,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:54:18,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:54:18,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:54:18,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:54:18,492 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:54:18,493 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:54:18,493 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:54:18,493 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:54:18,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:54:18,494 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:54:18,494 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:54:18,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:54:18,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:54:18,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:54:18,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:54:18,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:54:18,495 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:54:18,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:54:18,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:54:18,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:54:18,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:54:18,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:54:18,498 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:54:18,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:54:18,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:54:18,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:54:18,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:54:18,751 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:54:18,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2024-09-11 19:54:20,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:54:20,357 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:54:20,358 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2024-09-11 19:54:20,364 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/43c60aa8d/5b35873974b3478b924ce3d866ebe21f/FLAG81ca1d295 [2024-09-11 19:54:20,376 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/43c60aa8d/5b35873974b3478b924ce3d866ebe21f [2024-09-11 19:54:20,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:54:20,379 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:54:20,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:54:20,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:54:20,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:54:20,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a885084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20, skipping insertion in model container [2024-09-11 19:54:20,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,407 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:54:20,558 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2024-09-11 19:54:20,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:54:20,607 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:54:20,618 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2024-09-11 19:54:20,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:54:20,643 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:54:20,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20 WrapperNode [2024-09-11 19:54:20,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:54:20,644 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:54:20,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:54:20,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:54:20,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,678 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2024-09-11 19:54:20,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:54:20,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:54:20,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:54:20,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:54:20,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,701 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]. [2024-09-11 19:54:20,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:54:20,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:54:20,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:54:20,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:54:20,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (1/1) ... [2024-09-11 19:54:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:54:20,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:20,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 19:54:20,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 19:54:20,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:54:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:54:20,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:54:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:54:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:54:20,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:54:20,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:54:20,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:54:20,857 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:54:20,859 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:54:21,007 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-11 19:54:21,007 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:54:21,033 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:54:21,033 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-11 19:54:21,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:54:21 BoogieIcfgContainer [2024-09-11 19:54:21,034 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:54:21,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:54:21,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:54:21,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:54:21,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:54:20" (1/3) ... [2024-09-11 19:54:21,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b42ffb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:54:21, skipping insertion in model container [2024-09-11 19:54:21,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:20" (2/3) ... [2024-09-11 19:54:21,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b42ffb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:54:21, skipping insertion in model container [2024-09-11 19:54:21,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:54:21" (3/3) ... [2024-09-11 19:54:21,042 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2024-09-11 19:54:21,057 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:54:21,057 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:54:21,101 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:54:21,107 INFO L336 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2a2a43ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:54:21,107 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:54:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 19:54:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:54:21,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:21,136 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:21,136 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:21,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 67099435, now seen corresponding path program 1 times [2024-09-11 19:54:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:21,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071187192] [2024-09-11 19:54:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:54:21,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:21,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071187192] [2024-09-11 19:54:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071187192] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:21,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:21,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:54:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929229662] [2024-09-11 19:54:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:21,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:54:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:54:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:54:21,441 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:54:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:21,474 INFO L93 Difference]: Finished difference Result 62 states and 104 transitions. [2024-09-11 19:54:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:54:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-11 19:54:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:21,483 INFO L225 Difference]: With dead ends: 62 [2024-09-11 19:54:21,483 INFO L226 Difference]: Without dead ends: 30 [2024-09-11 19:54:21,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:54:21,491 INFO L434 NwaCegarLoop]: 39 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, 39 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 [2024-09-11 19:54:21,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-11 19:54:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-11 19:54:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 19:54:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-11 19:54:21,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 28 [2024-09-11 19:54:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:21,535 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-11 19:54:21,535 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:54:21,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-11 19:54:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:54:21,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:21,539 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:21,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:54:21,539 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:21,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1772608446, now seen corresponding path program 1 times [2024-09-11 19:54:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:21,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790722723] [2024-09-11 19:54:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:54:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790722723] [2024-09-11 19:54:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790722723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:21,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:21,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-11 19:54:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745500995] [2024-09-11 19:54:21,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:21,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:54:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:54:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:21,870 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:54:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:21,996 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2024-09-11 19:54:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:54:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-09-11 19:54:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:22,000 INFO L225 Difference]: With dead ends: 49 [2024-09-11 19:54:22,000 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 19:54:22,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:54:22,002 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:22,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 116 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 19:54:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2024-09-11 19:54:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 19:54:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-11 19:54:22,025 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2024-09-11 19:54:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:22,026 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-11 19:54:22,026 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:54:22,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-11 19:54:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:54:22,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:22,029 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:22,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:54:22,029 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:22,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1072684582, now seen corresponding path program 1 times [2024-09-11 19:54:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:22,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761155883] [2024-09-11 19:54:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:22,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107536761] [2024-09-11 19:54:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:22,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:22,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:54:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:54:22,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:54:22,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:22,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761155883] [2024-09-11 19:54:22,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107536761] [2024-09-11 19:54:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107536761] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:22,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416644230] [2024-09-11 19:54:22,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:22,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:22,273 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:54:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:22,335 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2024-09-11 19:54:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-09-11 19:54:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:22,339 INFO L225 Difference]: With dead ends: 48 [2024-09-11 19:54:22,339 INFO L226 Difference]: Without dead ends: 46 [2024-09-11 19:54:22,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:22,340 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:22,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-11 19:54:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-09-11 19:54:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:54:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-09-11 19:54:22,360 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2024-09-11 19:54:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:22,361 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-09-11 19:54:22,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:54:22,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-09-11 19:54:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 19:54:22,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:22,364 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:22,381 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:54:22,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:22,568 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:22,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 581538888, now seen corresponding path program 1 times [2024-09-11 19:54:22,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:22,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996190305] [2024-09-11 19:54:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:54:22,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:22,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996190305] [2024-09-11 19:54:22,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996190305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:22,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573821791] [2024-09-11 19:54:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:22,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:22,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:54:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:22,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:54:22,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:54:22,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:54:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573821791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:22,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:22,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-11 19:54:22,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032958349] [2024-09-11 19:54:22,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:22,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:54:22,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:54:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:54:22,982 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:54:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:23,222 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2024-09-11 19:54:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:54:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-11 19:54:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:23,226 INFO L225 Difference]: With dead ends: 98 [2024-09-11 19:54:23,228 INFO L226 Difference]: Without dead ends: 91 [2024-09-11 19:54:23,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:54:23,230 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:23,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 257 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:54:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-11 19:54:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2024-09-11 19:54:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-11 19:54:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2024-09-11 19:54:23,264 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 34 [2024-09-11 19:54:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:23,265 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2024-09-11 19:54:23,265 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:54:23,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2024-09-11 19:54:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:54:23,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:23,267 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:23,467 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:23,468 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:23,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1534715754, now seen corresponding path program 1 times [2024-09-11 19:54:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:23,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176700666] [2024-09-11 19:54:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609178818] [2024-09-11 19:54:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:23,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:23,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:23,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:54:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:23,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:54:23,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:54:23,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176700666] [2024-09-11 19:54:23,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609178818] [2024-09-11 19:54:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609178818] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:23,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:23,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952914873] [2024-09-11 19:54:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:23,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:23,636 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:54:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:23,701 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2024-09-11 19:54:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2024-09-11 19:54:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:23,703 INFO L225 Difference]: With dead ends: 74 [2024-09-11 19:54:23,703 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 19:54:23,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:23,704 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:23,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 19:54:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-09-11 19:54:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-11 19:54:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2024-09-11 19:54:23,729 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 37 [2024-09-11 19:54:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:23,730 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2024-09-11 19:54:23,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:54:23,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2024-09-11 19:54:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:54:23,732 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:23,732 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:23,753 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:23,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:23,937 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:23,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1190433772, now seen corresponding path program 1 times [2024-09-11 19:54:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:23,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623827156] [2024-09-11 19:54:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:54:24,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623827156] [2024-09-11 19:54:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623827156] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322178926] [2024-09-11 19:54:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:24,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:24,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:24,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:54:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:54:24,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:54:24,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:54:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322178926] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:24,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-11 19:54:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217366911] [2024-09-11 19:54:24,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:24,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:54:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:54:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:54:24,339 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-11 19:54:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:24,532 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2024-09-11 19:54:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:54:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 37 [2024-09-11 19:54:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:24,534 INFO L225 Difference]: With dead ends: 97 [2024-09-11 19:54:24,534 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:54:24,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:54:24,535 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:24,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 133 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:54:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-11 19:54:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:54:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-09-11 19:54:24,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 37 [2024-09-11 19:54:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:24,549 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-09-11 19:54:24,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-11 19:54:24,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-09-11 19:54:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 19:54:24,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:24,550 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:24,567 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:54:24,751 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:24,751 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:24,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1246105370, now seen corresponding path program 1 times [2024-09-11 19:54:24,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:24,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307760340] [2024-09-11 19:54:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:24,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:24,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58428099] [2024-09-11 19:54:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:24,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:24,768 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:54:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:24,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:54:24,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:54:24,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:24,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:24,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307760340] [2024-09-11 19:54:24,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:24,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58428099] [2024-09-11 19:54:24,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58428099] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:24,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:24,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487483691] [2024-09-11 19:54:24,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:24,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:24,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:24,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:24,862 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:54:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:24,922 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2024-09-11 19:54:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-09-11 19:54:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:24,923 INFO L225 Difference]: With dead ends: 74 [2024-09-11 19:54:24,923 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 19:54:24,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:24,924 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:24,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 19:54:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-09-11 19:54:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-11 19:54:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2024-09-11 19:54:24,941 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 42 [2024-09-11 19:54:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:24,942 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2024-09-11 19:54:24,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:54:24,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2024-09-11 19:54:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-11 19:54:24,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:24,943 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:25,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:54:25,144 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:25,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash 225223382, now seen corresponding path program 1 times [2024-09-11 19:54:25,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:25,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352056769] [2024-09-11 19:54:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:25,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:25,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133117922] [2024-09-11 19:54:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:25,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:25,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:25,159 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:54:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:25,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:54:25,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:54:25,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352056769] [2024-09-11 19:54:25,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133117922] [2024-09-11 19:54:25,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133117922] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:25,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:25,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:25,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419944077] [2024-09-11 19:54:25,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:25,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:25,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:25,248 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:54:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:25,307 INFO L93 Difference]: Finished difference Result 101 states and 143 transitions. [2024-09-11 19:54:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:25,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-09-11 19:54:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:25,309 INFO L225 Difference]: With dead ends: 101 [2024-09-11 19:54:25,309 INFO L226 Difference]: Without dead ends: 99 [2024-09-11 19:54:25,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:25,311 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:25,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-11 19:54:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2024-09-11 19:54:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.183673469387755) internal successors, (58), 54 states have internal predecessors, (58), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-11 19:54:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 131 transitions. [2024-09-11 19:54:25,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 131 transitions. Word has length 47 [2024-09-11 19:54:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:25,335 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 131 transitions. [2024-09-11 19:54:25,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:54:25,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 131 transitions. [2024-09-11 19:54:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-11 19:54:25,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:25,337 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:25,354 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:25,538 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:25,538 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:25,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 371933676, now seen corresponding path program 1 times [2024-09-11 19:54:25,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:25,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911779727] [2024-09-11 19:54:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:25,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398493750] [2024-09-11 19:54:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:25,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:25,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:54:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:25,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-11 19:54:25,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:54:26,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-11 19:54:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911779727] [2024-09-11 19:54:28,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398493750] [2024-09-11 19:54:28,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398493750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:28,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:54:28,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-11 19:54:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114120449] [2024-09-11 19:54:28,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:28,149 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:54:28,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:54:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:54:28,150 INFO L87 Difference]: Start difference. First operand 93 states and 131 transitions. Second operand has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 19:54:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:32,095 INFO L93 Difference]: Finished difference Result 326 states and 505 transitions. [2024-09-11 19:54:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-11 19:54:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 59 [2024-09-11 19:54:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:32,101 INFO L225 Difference]: With dead ends: 326 [2024-09-11 19:54:32,103 INFO L226 Difference]: Without dead ends: 322 [2024-09-11 19:54:32,105 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=728, Invalid=2694, Unknown=0, NotChecked=0, Total=3422 [2024-09-11 19:54:32,107 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:32,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 472 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-11 19:54:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-09-11 19:54:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 184. [2024-09-11 19:54:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 110 states have internal predecessors, (130), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2024-09-11 19:54:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 267 transitions. [2024-09-11 19:54:32,204 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 267 transitions. Word has length 59 [2024-09-11 19:54:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:32,204 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 267 transitions. [2024-09-11 19:54:32,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 19:54:32,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 267 transitions. [2024-09-11 19:54:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-11 19:54:32,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:32,206 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:32,222 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:54:32,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:32,411 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:32,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1738660030, now seen corresponding path program 1 times [2024-09-11 19:54:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:32,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237511228] [2024-09-11 19:54:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 19:54:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:54:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:54:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 19:54:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 19:54:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:54:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237511228] [2024-09-11 19:54:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237511228] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:32,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892476067] [2024-09-11 19:54:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:32,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:32,486 INFO L87 Difference]: Start difference. First operand 184 states and 267 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-11 19:54:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:32,596 INFO L93 Difference]: Finished difference Result 305 states and 439 transitions. [2024-09-11 19:54:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2024-09-11 19:54:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:32,599 INFO L225 Difference]: With dead ends: 305 [2024-09-11 19:54:32,600 INFO L226 Difference]: Without dead ends: 181 [2024-09-11 19:54:32,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:32,603 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:32,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-11 19:54:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2024-09-11 19:54:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 109 states have internal predecessors, (132), 61 states have call successors, (61), 8 states have call predecessors, (61), 8 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-09-11 19:54:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 253 transitions. [2024-09-11 19:54:32,674 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 253 transitions. Word has length 67 [2024-09-11 19:54:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:32,674 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 253 transitions. [2024-09-11 19:54:32,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-11 19:54:32,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 253 transitions. [2024-09-11 19:54:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-11 19:54:32,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:32,676 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:32,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-11 19:54:32,676 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:32,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -681710528, now seen corresponding path program 1 times [2024-09-11 19:54:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990995047] [2024-09-11 19:54:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 19:54:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:54:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:54:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 19:54:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-11 19:54:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990995047] [2024-09-11 19:54:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990995047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843078430] [2024-09-11 19:54:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:32,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:32,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:54:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:54:33,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-11 19:54:33,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-11 19:54:33,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843078430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:33,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:33,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-11 19:54:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185155416] [2024-09-11 19:54:33,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:33,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:54:33,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:33,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:54:33,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:54:33,226 INFO L87 Difference]: Start difference. First operand 178 states and 253 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:54:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:33,436 INFO L93 Difference]: Finished difference Result 254 states and 357 transitions. [2024-09-11 19:54:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:54:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 67 [2024-09-11 19:54:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:33,438 INFO L225 Difference]: With dead ends: 254 [2024-09-11 19:54:33,438 INFO L226 Difference]: Without dead ends: 139 [2024-09-11 19:54:33,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:54:33,439 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:33,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 255 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-11 19:54:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-11 19:54:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.197674418604651) internal successors, (103), 87 states have internal predecessors, (103), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-11 19:54:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2024-09-11 19:54:33,525 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 67 [2024-09-11 19:54:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:33,526 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2024-09-11 19:54:33,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:54:33,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2024-09-11 19:54:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 19:54:33,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:33,528 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:33,545 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:54:33,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:33,733 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:33,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1835197705, now seen corresponding path program 1 times [2024-09-11 19:54:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121802079] [2024-09-11 19:54:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 19:54:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:54:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:54:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-11 19:54:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:54:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:54:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-11 19:54:33,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:33,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121802079] [2024-09-11 19:54:33,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121802079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:33,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454588014] [2024-09-11 19:54:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:33,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:33,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:54:34,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:54:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:34,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-11 19:54:34,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-11 19:54:34,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-11 19:54:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454588014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:34,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:34,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-11 19:54:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930919799] [2024-09-11 19:54:34,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:34,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:54:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:54:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:54:34,326 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-11 19:54:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:34,449 INFO L93 Difference]: Finished difference Result 155 states and 204 transitions. [2024-09-11 19:54:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:54:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 69 [2024-09-11 19:54:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:34,451 INFO L225 Difference]: With dead ends: 155 [2024-09-11 19:54:34,451 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:54:34,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:54:34,452 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:34,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:54:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:54:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:54:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:54:34,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2024-09-11 19:54:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:34,455 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:54:34,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-11 19:54:34,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:54:34,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:54:34,458 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:54:34,475 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:34,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 19:54:34,663 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:34,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:54:35,560 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 19:54:35,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 07:54:35 BoogieIcfgContainer [2024-09-11 19:54:35,579 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 19:54:35,579 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 19:54:35,579 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 19:54:35,579 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 19:54:35,580 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:54:21" (3/4) ... [2024-09-11 19:54:35,582 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 19:54:35,586 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-11 19:54:35,586 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-11 19:54:35,591 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-09-11 19:54:35,591 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-11 19:54:35,591 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 19:54:35,591 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 19:54:35,682 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 19:54:35,683 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 19:54:35,683 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 19:54:35,683 INFO L158 Benchmark]: Toolchain (without parser) took 15304.09ms. Allocated memory was 176.2MB in the beginning and 281.0MB in the end (delta: 104.9MB). Free memory was 120.4MB in the beginning and 232.8MB in the end (delta: -112.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:54:35,684 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 176.2MB. Free memory is still 135.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:54:35,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.06ms. Allocated memory is still 176.2MB. Free memory was 120.4MB in the beginning and 108.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:54:35,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.44ms. Allocated memory is still 176.2MB. Free memory was 108.6MB in the beginning and 106.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:54:35,684 INFO L158 Benchmark]: Boogie Preprocessor took 32.71ms. Allocated memory is still 176.2MB. Free memory was 106.9MB in the beginning and 105.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:54:35,685 INFO L158 Benchmark]: RCFGBuilder took 321.07ms. Allocated memory is still 176.2MB. Free memory was 104.8MB in the beginning and 92.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:54:35,685 INFO L158 Benchmark]: TraceAbstraction took 14542.54ms. Allocated memory was 176.2MB in the beginning and 281.0MB in the end (delta: 104.9MB). Free memory was 91.5MB in the beginning and 238.0MB in the end (delta: -146.6MB). Peak memory consumption was 110.6MB. Max. memory is 16.1GB. [2024-09-11 19:54:35,685 INFO L158 Benchmark]: Witness Printer took 103.72ms. Allocated memory is still 281.0MB. Free memory was 238.0MB in the beginning and 232.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 19:54:35,687 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 176.2MB. Free memory is still 135.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.06ms. Allocated memory is still 176.2MB. Free memory was 120.4MB in the beginning and 108.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.44ms. Allocated memory is still 176.2MB. Free memory was 108.6MB in the beginning and 106.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.71ms. Allocated memory is still 176.2MB. Free memory was 106.9MB in the beginning and 105.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 321.07ms. Allocated memory is still 176.2MB. Free memory was 104.8MB in the beginning and 92.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14542.54ms. Allocated memory was 176.2MB in the beginning and 281.0MB in the end (delta: 104.9MB). Free memory was 91.5MB in the beginning and 238.0MB in the end (delta: -146.6MB). Peak memory consumption was 110.6MB. Max. memory is 16.1GB. * Witness Printer took 103.72ms. Allocated memory is still 281.0MB. Free memory was 238.0MB in the beginning and 232.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.6s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 532 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 506 mSDsluCounter, 2053 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1667 mSDsCounter, 330 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1327 IncrementalHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 330 mSolverCounterUnsat, 386 mSDtfsCounter, 1327 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 873 GetRequests, 717 SyntacticMatches, 12 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=9, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 196 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 972 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1000 ConstructedInterpolants, 0 QuantifiedInterpolants, 3249 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1143 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 1097/1192 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 74]: Location Invariant Derived location invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((c == 0) && (k == 1)) && (b == 1)) && (p == 1)) && (a == 1)) && (x == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (s == 1)) || ((((((((((b == 1) && (p == 1)) && (c == 1)) && (a == 1)) && (x == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (k == 0)) && (s == 1))) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((d == 1) && (p == 1)) && (c <= 1)) && (v == 1)) && (b == v)) && (x == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (k == 0)) && (b <= c)) && (a == x)) && (s == 1)) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((p == 0) && (a <= 1)) && (b == 0)) && (q == 1)) && (y == 1)) && (1 <= x)) && (r == 1)) && (((long long) x + 1) <= ((__int128) 2 * a))) && (((__int128) s + 1) == 0)) || ((((((((b == 1) && (p == 1)) && (a == 1)) && (x == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (s == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-11 19:54:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE