./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --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/geo1-ll_unwindbound20.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 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a --procedureinliner.inline.calls.to.implemented.procedures NEVER --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 [2024-09-12 16:01:35,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:01:35,397 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:01:35,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:01:35,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:01:35,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:01:35,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:01:35,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:01:35,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:01:35,438 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:01:35,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:01:35,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:01:35,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:01:35,439 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:01:35,439 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:01:35,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:01:35,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:01:35,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:01:35,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:01:35,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:01:35,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:01:35,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:01:35,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:01:35,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:01:35,443 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:01:35,443 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:01:35,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:01:35,444 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:01:35,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:01:35,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:01:35,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:01:35,445 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:01:35,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:01:35,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:01:35,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:01:35,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:01:35,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:01:35,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:01:35,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:01:35,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:01:35,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:01:35,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:01:35,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:01:35,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:01:35,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:01:35,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:01:35,802 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:01:35,803 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:01:35,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2024-09-12 16:01:37,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:01:37,472 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:01:37,473 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2024-09-12 16:01:37,484 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/68c6323fa/09b67c6882cb4d64b8477cc7bd162dda/FLAG2cc889607 [2024-09-12 16:01:37,499 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/68c6323fa/09b67c6882cb4d64b8477cc7bd162dda [2024-09-12 16:01:37,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:01:37,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:01:37,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:01:37,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:01:37,511 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:01:37,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3194b4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37, skipping insertion in model container [2024-09-12 16:01:37,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:01:37,685 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/geo1-ll_unwindbound20.c[546,559] [2024-09-12 16:01:37,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:01:37,717 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:01:37,729 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/geo1-ll_unwindbound20.c[546,559] [2024-09-12 16:01:37,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:01:37,754 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:01:37,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37 WrapperNode [2024-09-12 16:01:37,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:01:37,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:01:37,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:01:37,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:01:37,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,775 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:01:37,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:01:37,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:01:37,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:01:37,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:01:37,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,789 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,805 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]. [2024-09-12 16:01:37,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,817 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:01:37,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:01:37,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:01:37,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:01:37,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (1/1) ... [2024-09-12 16:01:37,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:01:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:37,861 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) [2024-09-12 16:01:37,864 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 [2024-09-12 16:01:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:01:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:01:37,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:01:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:01:37,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:01:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:01:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:01:37,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:01:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:01:37,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:01:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:01:37,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:01:37,974 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:01:37,976 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:01:38,126 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-12 16:01:38,127 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:01:38,155 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:01:38,155 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:01:38,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:01:38 BoogieIcfgContainer [2024-09-12 16:01:38,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:01:38,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:01:38,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:01:38,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:01:38,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:01:37" (1/3) ... [2024-09-12 16:01:38,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf65143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:01:38, skipping insertion in model container [2024-09-12 16:01:38,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:37" (2/3) ... [2024-09-12 16:01:38,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf65143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:01:38, skipping insertion in model container [2024-09-12 16:01:38,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:01:38" (3/3) ... [2024-09-12 16:01:38,166 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2024-09-12 16:01:38,181 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:01:38,182 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:01:38,241 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:01:38,248 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;@316b4af5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:01:38,249 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:01:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:01:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 16:01:38,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:38,260 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:38,261 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:38,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1666515900, now seen corresponding path program 1 times [2024-09-12 16:01:38,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:38,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093308829] [2024-09-12 16:01:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:38,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:38,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:38,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:38,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:38,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093308829] [2024-09-12 16:01:38,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093308829] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:38,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:38,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 16:01:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915138238] [2024-09-12 16:01:38,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:38,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 16:01:38,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 16:01:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 16:01:38,525 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:38,610 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-12 16:01:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 16:01:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-12 16:01:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:38,620 INFO L225 Difference]: With dead ends: 51 [2024-09-12 16:01:38,621 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 16:01:38,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 16:01:38,627 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:38,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:01:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 16:01:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-12 16:01:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 16:01:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-12 16:01:38,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2024-09-12 16:01:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:38,674 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-12 16:01:38,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:38,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-12 16:01:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 16:01:38,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:38,680 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:38,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:01:38,680 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:38,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -387848543, now seen corresponding path program 1 times [2024-09-12 16:01:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:38,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424711122] [2024-09-12 16:01:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:38,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114132397] [2024-09-12 16:01:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:38,720 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) [2024-09-12 16:01:38,722 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:01:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:38,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 16:01:38,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:38,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:01:38,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:38,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424711122] [2024-09-12 16:01:38,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:01:38,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114132397] [2024-09-12 16:01:38,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114132397] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:38,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:38,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:01:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052551155] [2024-09-12 16:01:38,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:38,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:01:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:01:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:01:38,910 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:01:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:38,970 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-12 16:01:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:01:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-12 16:01:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:38,971 INFO L225 Difference]: With dead ends: 35 [2024-09-12 16:01:38,971 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 16:01:38,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:01:38,976 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:38,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:01:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 16:01:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-12 16:01:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:01:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-12 16:01:38,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2024-09-12 16:01:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:38,994 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-12 16:01:38,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:01:38,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-12 16:01:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 16:01:38,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:38,998 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:39,015 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:01:39,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:39,203 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 783720481, now seen corresponding path program 1 times [2024-09-12 16:01:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620065380] [2024-09-12 16:01:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:39,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:39,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620065380] [2024-09-12 16:01:39,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620065380] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:39,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:01:39,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956408409] [2024-09-12 16:01:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:39,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:01:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:01:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:01:39,392 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:39,494 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-12 16:01:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 16:01:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-12 16:01:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:39,497 INFO L225 Difference]: With dead ends: 39 [2024-09-12 16:01:39,497 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 16:01:39,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:01:39,500 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:39,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:01:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 16:01:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 16:01:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:01:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-12 16:01:39,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2024-09-12 16:01:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:39,511 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-12 16:01:39,512 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:39,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-12 16:01:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 16:01:39,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:39,513 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:39,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 16:01:39,514 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:39,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1293449266, now seen corresponding path program 1 times [2024-09-12 16:01:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:39,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352632587] [2024-09-12 16:01:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 16:01:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352632587] [2024-09-12 16:01:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352632587] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:01:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342421068] [2024-09-12 16:01:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:39,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:39,853 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) [2024-09-12 16:01:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:01:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:39,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 16:01:39,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:40,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:01:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342421068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:01:40,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:01:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2024-09-12 16:01:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680465075] [2024-09-12 16:01:40,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:01:40,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:01:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:40,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:01:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:01:40,378 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:01:44,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:01:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:44,872 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-12 16:01:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:01:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-09-12 16:01:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:44,874 INFO L225 Difference]: With dead ends: 45 [2024-09-12 16:01:44,874 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 16:01:44,875 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:01:44,876 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:44,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-12 16:01:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 16:01:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 16:01:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:01:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-12 16:01:44,889 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2024-09-12 16:01:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:44,889 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-12 16:01:44,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:01:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-12 16:01:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 16:01:44,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:44,892 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 16:01:45,095 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 [2024-09-12 16:01:45,096 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1959775791, now seen corresponding path program 1 times [2024-09-12 16:01:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992704011] [2024-09-12 16:01:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713653231] [2024-09-12 16:01:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:45,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:45,136 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) [2024-09-12 16:01:45,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:01:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:45,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 16:01:45,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:01:45,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:01:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:01:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992704011] [2024-09-12 16:01:58,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:01:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713653231] [2024-09-12 16:01:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713653231] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:01:58,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:01:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-12 16:01:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304852714] [2024-09-12 16:01:58,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:01:58,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:01:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:01:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2024-09-12 16:01:58,297 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 16:02:09,287 WARN L293 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:02:13,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:30,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.98s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:34,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:38,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:42,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:46,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:50,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:10,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:14,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:18,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:22,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:26,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:30,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:34,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:38,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:42,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:46,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:50,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:03:50,687 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-12 16:03:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:03:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38 [2024-09-12 16:03:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:03:50,689 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:03:50,689 INFO L226 Difference]: Without dead ends: 64 [2024-09-12 16:03:50,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=74, Invalid=259, Unknown=9, NotChecked=0, Total=342 [2024-09-12 16:03:50,690 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:03:50,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 73.3s Time] [2024-09-12 16:03:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-12 16:03:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-12 16:03:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:03:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-12 16:03:50,715 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 38 [2024-09-12 16:03:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:03:50,715 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-12 16:03:50,715 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 16:03:50,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-12 16:03:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 16:03:50,717 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:03:50,717 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:03:50,736 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:03:50,918 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 [2024-09-12 16:03:50,918 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:03:50,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash -701383951, now seen corresponding path program 1 times [2024-09-12 16:03:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:03:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373324841] [2024-09-12 16:03:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:03:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:03:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:03:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:03:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 16:03:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:03:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:03:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:03:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373324841] [2024-09-12 16:03:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373324841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:03:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35346031] [2024-09-12 16:03:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:51,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:03:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:03:51,085 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) [2024-09-12 16:03:51,086 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:03:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:51,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 16:03:51,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:03:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:03:51,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:03:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:03:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35346031] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:03:51,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:03:51,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-12 16:03:51,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355635449] [2024-09-12 16:03:51,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:03:51,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:03:51,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:03:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:03:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:03:51,292 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 16:03:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:03:51,509 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-12 16:03:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 16:03:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 39 [2024-09-12 16:03:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:03:51,514 INFO L225 Difference]: With dead ends: 79 [2024-09-12 16:03:51,514 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 16:03:51,514 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-12 16:03:51,517 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:03:51,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:03:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 16:03:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-12 16:03:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 51 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:03:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-09-12 16:03:51,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 39 [2024-09-12 16:03:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:03:51,554 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-09-12 16:03:51,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 16:03:51,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-09-12 16:03:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 16:03:51,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:03:51,560 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:03:51,576 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:03:51,760 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 [2024-09-12 16:03:51,761 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:03:51,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1815586865, now seen corresponding path program 2 times [2024-09-12 16:03:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:03:51,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054193176] [2024-09-12 16:03:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:51,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:03:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:03:51,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936866168] [2024-09-12 16:03:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:03:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:03:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:03:51,871 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) [2024-09-12 16:03:51,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:03:52,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:03:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:03:52,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 16:03:52,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:03:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 16:03:52,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:05:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 78 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 16:05:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:05:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054193176] [2024-09-12 16:05:53,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:05:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936866168] [2024-09-12 16:05:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936866168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:05:53,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:05:53,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2024-09-12 16:05:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802512916] [2024-09-12 16:05:53,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:05:53,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 16:05:53,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:05:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 16:05:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=417, Unknown=24, NotChecked=0, Total=552 [2024-09-12 16:05:53,710 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 14 states have call predecessors, (17), 15 states have call successors, (17) [2024-09-12 16:05:58,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []