./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.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 1d5fa637 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/egcd2-ll_valuebound20.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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --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-1d5fa63-m [2024-09-13 09:15:37,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:15:37,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:15:37,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:15:37,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:15:37,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:15:37,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:15:37,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:15:37,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:15:37,210 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:15:37,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:15:37,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:15:37,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:15:37,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:15:37,213 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:15:37,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:15:37,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:15:37,214 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:15:37,214 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:15:37,214 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:15:37,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:15:37,218 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:15:37,218 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:15:37,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:15:37,219 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:15:37,219 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:15:37,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:15:37,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:15:37,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:15:37,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:15:37,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:15:37,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:15:37,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:15:37,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:15:37,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:15:37,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:15:37,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:15:37,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:15:37,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:15:37,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:15:37,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:15:37,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:15:37,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:15:37,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:15:37,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:15:37,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:15:37,513 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:15:37,513 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:15:37,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-13 09:15:38,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:15:38,990 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:15:38,990 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-13 09:15:38,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7f1c770e6/67c0380bcf014826884b7f641c369b6d/FLAG4a0c0b6e7 [2024-09-13 09:15:39,380 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7f1c770e6/67c0380bcf014826884b7f641c369b6d [2024-09-13 09:15:39,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:15:39,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:15:39,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:15:39,386 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:15:39,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:15:39,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5849c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39, skipping insertion in model container [2024-09-13 09:15:39,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,413 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:15:39,546 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/egcd2-ll_valuebound20.c[490,503] [2024-09-13 09:15:39,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:15:39,577 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:15:39,589 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/egcd2-ll_valuebound20.c[490,503] [2024-09-13 09:15:39,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:15:39,626 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:15:39,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39 WrapperNode [2024-09-13 09:15:39,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:15:39,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:15:39,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:15:39,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:15:39,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,648 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,659 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:15:39,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:15:39,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:15:39,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:15:39,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:15:39,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,691 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]. [2024-09-13 09:15:39,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:15:39,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:15:39,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:15:39,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:15:39,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (1/1) ... [2024-09-13 09:15:39,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:15:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:39,753 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) [2024-09-13 09:15:39,758 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 [2024-09-13 09:15:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:15:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:15:39,799 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:15:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:15:39,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:15:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:15:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:15:39,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:15:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:15:39,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:15:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:15:39,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:15:39,854 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:15:39,856 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:15:40,033 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 09:15:40,034 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:15:40,082 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:15:40,082 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 09:15:40,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:15:40 BoogieIcfgContainer [2024-09-13 09:15:40,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:15:40,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:15:40,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:15:40,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:15:40,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:15:39" (1/3) ... [2024-09-13 09:15:40,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a69569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:15:40, skipping insertion in model container [2024-09-13 09:15:40,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:39" (2/3) ... [2024-09-13 09:15:40,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a69569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:15:40, skipping insertion in model container [2024-09-13 09:15:40,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:15:40" (3/3) ... [2024-09-13 09:15:40,093 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2024-09-13 09:15:40,108 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:15:40,109 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:15:40,158 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:15:40,164 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;@1f5b568, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:15:40,164 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:15:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 09:15:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 09:15:40,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:40,176 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:40,177 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:40,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-13 09:15:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251907495] [2024-09-13 09:15:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:15:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:15:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:15:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:15:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:15:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 09:15:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:15:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:15:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:40,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251907495] [2024-09-13 09:15:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251907495] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:40,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 09:15:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188669276] [2024-09-13 09:15:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:40,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 09:15:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:40,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 09:15:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:15:40,466 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:15:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:40,503 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-13 09:15:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 09:15:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-13 09:15:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:40,513 INFO L225 Difference]: With dead ends: 70 [2024-09-13 09:15:40,514 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 09:15:40,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:15:40,522 INFO L434 NwaCegarLoop]: 47 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, 47 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 [2024-09-13 09:15:40,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:15:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 09:15:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 09:15:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 09:15:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-13 09:15:40,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-13 09:15:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:40,568 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-13 09:15:40,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:15:40,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-13 09:15:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 09:15:40,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:40,574 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-09-13 09:15:40,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:15:40,574 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:40,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-13 09:15:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:40,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531158745] [2024-09-13 09:15:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:40,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:15:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:15:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:15:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:15:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:15:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 09:15:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:15:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 09:15:40,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:40,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531158745] [2024-09-13 09:15:40,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531158745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:15:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735378708] [2024-09-13 09:15:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:40,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:40,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:40,972 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) [2024-09-13 09:15:40,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:15:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:41,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 09:15:41,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 09:15:41,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:15:41,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735378708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:15:41,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:15:41,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-13 09:15:41,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818954005] [2024-09-13 09:15:41,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:15:41,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:15:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:15:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:15:41,491 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 09:15:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:41,786 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-13 09:15:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:15:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-13 09:15:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:41,788 INFO L225 Difference]: With dead ends: 55 [2024-09-13 09:15:41,788 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 09:15:41,789 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 09:15:41,790 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:41,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:15:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 09:15:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 09:15:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 09:15:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-13 09:15:41,803 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-13 09:15:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:41,804 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-13 09:15:41,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 09:15:41,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-13 09:15:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 09:15:41,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:41,810 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-09-13 09:15:41,825 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 09:15:42,014 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 [2024-09-13 09:15:42,015 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:42,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-13 09:15:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526860760] [2024-09-13 09:15:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465219229] [2024-09-13 09:15:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:42,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:42,042 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) [2024-09-13 09:15:42,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:15:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:42,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:15:42,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:15:42,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:15:42,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:42,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526860760] [2024-09-13 09:15:42,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465219229] [2024-09-13 09:15:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465219229] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:42,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:42,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:15:42,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301168592] [2024-09-13 09:15:42,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:42,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:15:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:15:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:15:42,144 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 09:15:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:42,202 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-13 09:15:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:15:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-13 09:15:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:42,204 INFO L225 Difference]: With dead ends: 65 [2024-09-13 09:15:42,205 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 09:15:42,205 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:42,206 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:42,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:15:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 09:15:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-13 09:15:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 09:15:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-13 09:15:42,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-13 09:15:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:42,226 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-13 09:15:42,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 09:15:42,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-13 09:15:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 09:15:42,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:42,228 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-09-13 09:15:42,243 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 09:15:42,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:42,430 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-13 09:15:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628804253] [2024-09-13 09:15:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:42,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091262218] [2024-09-13 09:15:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:42,471 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) [2024-09-13 09:15:42,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:15:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:42,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:15:42,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:15:42,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:15:42,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:42,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628804253] [2024-09-13 09:15:42,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091262218] [2024-09-13 09:15:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091262218] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:15:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103290186] [2024-09-13 09:15:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:42,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:15:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:15:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:15:42,610 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:15:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:42,659 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-13 09:15:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:15:42,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 09:15:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:42,665 INFO L225 Difference]: With dead ends: 61 [2024-09-13 09:15:42,665 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 09:15:42,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:42,666 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:42,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:15:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 09:15:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-13 09:15:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 09:15:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-13 09:15:42,690 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-13 09:15:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:42,691 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-13 09:15:42,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:15:42,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-13 09:15:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 09:15:42,692 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:42,694 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:42,709 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 09:15:42,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:42,895 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:42,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-13 09:15:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:42,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067799833] [2024-09-13 09:15:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:42,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873388249] [2024-09-13 09:15:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:42,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:42,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:42,934 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) [2024-09-13 09:15:42,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:15:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:42,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 09:15:43,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 09:15:43,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:15:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067799833] [2024-09-13 09:15:43,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:43,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873388249] [2024-09-13 09:15:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873388249] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:43,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:43,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:15:43,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669211366] [2024-09-13 09:15:43,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:43,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:15:43,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:15:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:15:43,164 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 09:15:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:43,245 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-13 09:15:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:15:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-13 09:15:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:43,247 INFO L225 Difference]: With dead ends: 65 [2024-09-13 09:15:43,247 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 09:15:43,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:43,248 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:43,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 09:15:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-13 09:15:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 09:15:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 09:15:43,272 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-13 09:15:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:43,272 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 09:15:43,272 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 09:15:43,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 09:15:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 09:15:43,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:43,274 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1] [2024-09-13 09:15:43,292 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:15:43,478 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:43,479 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:43,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-13 09:15:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197103913] [2024-09-13 09:15:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:43,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938521011] [2024-09-13 09:15:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:43,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:43,504 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) [2024-09-13 09:15:43,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:15:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:43,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 09:15:43,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:15:43,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:15:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:15:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197103913] [2024-09-13 09:15:43,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938521011] [2024-09-13 09:15:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938521011] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:15:43,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:15:43,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-13 09:15:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76214843] [2024-09-13 09:15:43,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:15:43,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:15:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:15:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:15:43,736 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 09:15:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:43,841 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-13 09:15:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:15:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-13 09:15:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:43,844 INFO L225 Difference]: With dead ends: 90 [2024-09-13 09:15:43,844 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 09:15:43,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:15:43,845 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:43,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 09:15:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-13 09:15:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 09:15:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-13 09:15:43,866 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-13 09:15:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:43,867 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-13 09:15:43,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 09:15:43,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-13 09:15:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 09:15:43,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:43,869 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:43,887 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:15:44,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 09:15:44,070 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:44,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-13 09:15:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:44,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831479578] [2024-09-13 09:15:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:15:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:15:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:15:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:15:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:15:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 09:15:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:15:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 09:15:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 09:15:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 09:15:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 09:15:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 09:15:44,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831479578] [2024-09-13 09:15:44,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831479578] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:15:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776518030] [2024-09-13 09:15:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:44,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:44,308 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) [2024-09-13 09:15:44,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:15:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:44,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:15:44,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 09:15:44,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:15:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 09:15:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776518030] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:15:44,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:15:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 09:15:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956251338] [2024-09-13 09:15:44,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:15:44,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:15:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:15:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:15:44,506 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 09:15:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:44,699 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-13 09:15:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:15:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-13 09:15:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:44,703 INFO L225 Difference]: With dead ends: 105 [2024-09-13 09:15:44,703 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 09:15:44,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:15:44,705 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:44,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 09:15:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-13 09:15:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-13 09:15:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-13 09:15:44,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-13 09:15:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:44,744 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-13 09:15:44,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 09:15:44,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-13 09:15:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 09:15:44,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:44,747 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:44,763 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:15:44,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:44,948 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:44,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-13 09:15:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084518359] [2024-09-13 09:15:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:44,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932935555] [2024-09-13 09:15:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:44,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:44,966 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) [2024-09-13 09:15:44,969 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:15:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:45,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 09:15:45,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 09:15:45,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:15:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084518359] [2024-09-13 09:15:45,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932935555] [2024-09-13 09:15:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932935555] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:15:45,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:15:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-13 09:15:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995848897] [2024-09-13 09:15:45,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:15:45,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 09:15:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 09:15:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:15:45,206 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 09:15:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:45,330 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 09:15:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:15:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-13 09:15:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:45,332 INFO L225 Difference]: With dead ends: 123 [2024-09-13 09:15:45,332 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 09:15:45,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:15:45,333 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:45,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 09:15:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 09:15:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 09:15:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-13 09:15:45,383 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-13 09:15:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:45,384 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-13 09:15:45,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 09:15:45,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-13 09:15:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 09:15:45,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:45,388 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:45,406 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:15:45,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:45,590 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:45,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-13 09:15:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461955986] [2024-09-13 09:15:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:45,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:45,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421146958] [2024-09-13 09:15:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:15:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:45,621 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) [2024-09-13 09:15:45,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:15:45,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:15:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:15:45,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:15:45,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 09:15:45,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:15:45,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:45,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461955986] [2024-09-13 09:15:45,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:45,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421146958] [2024-09-13 09:15:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421146958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:15:45,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:15:45,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 09:15:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428952954] [2024-09-13 09:15:45,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:15:45,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 09:15:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 09:15:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:15:45,989 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 09:15:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:46,163 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-13 09:15:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:15:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-13 09:15:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:46,165 INFO L225 Difference]: With dead ends: 129 [2024-09-13 09:15:46,165 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 09:15:46,165 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:15:46,166 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:46,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 09:15:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-13 09:15:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 09:15:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-13 09:15:46,202 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-13 09:15:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:46,203 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-13 09:15:46,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 09:15:46,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-13 09:15:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 09:15:46,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:46,206 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:46,223 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 09:15:46,407 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:46,407 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:46,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-13 09:15:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214693000] [2024-09-13 09:15:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135993303] [2024-09-13 09:15:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:15:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:46,432 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) [2024-09-13 09:15:46,435 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:15:46,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 09:15:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:15:46,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 09:15:46,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-13 09:15:47,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:03,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214693000] [2024-09-13 09:16:03,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:03,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135993303] [2024-09-13 09:16:03,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135993303] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:03,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:03,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 09:16:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23624701] [2024-09-13 09:16:03,058 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:03,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:16:03,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:16:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-13 09:16:03,060 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 09:16:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:03,566 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-13 09:16:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:16:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-13 09:16:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:03,570 INFO L225 Difference]: With dead ends: 133 [2024-09-13 09:16:03,570 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 09:16:03,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-13 09:16:03,572 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:03,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:16:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 09:16:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-13 09:16:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 09:16:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-13 09:16:03,609 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-13 09:16:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:03,609 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-13 09:16:03,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 09:16:03,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-13 09:16:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 09:16:03,611 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:03,611 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:03,630 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 09:16:03,815 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 09:16:03,815 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:03,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-13 09:16:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890712964] [2024-09-13 09:16:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635675008] [2024-09-13 09:16:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:03,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:03,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:16:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:03,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 09:16:03,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-13 09:16:04,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 09:16:05,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890712964] [2024-09-13 09:16:05,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635675008] [2024-09-13 09:16:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635675008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:05,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 09:16:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829200457] [2024-09-13 09:16:05,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:05,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 09:16:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 09:16:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:16:05,255 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 09:16:10,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:16:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:12,572 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2024-09-13 09:16:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 09:16:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-13 09:16:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:12,576 INFO L225 Difference]: With dead ends: 262 [2024-09-13 09:16:12,576 INFO L226 Difference]: Without dead ends: 258 [2024-09-13 09:16:12,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 09:16:12,578 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 73 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:12,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 454 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 563 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-09-13 09:16:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-09-13 09:16:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2024-09-13 09:16:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 129 states have (on average 1.255813953488372) internal successors, (162), 132 states have internal predecessors, (162), 112 states have call successors, (112), 14 states have call predecessors, (112), 13 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2024-09-13 09:16:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 383 transitions. [2024-09-13 09:16:12,690 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 383 transitions. Word has length 90 [2024-09-13 09:16:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:12,691 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 383 transitions. [2024-09-13 09:16:12,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 09:16:12,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 383 transitions. [2024-09-13 09:16:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 09:16:12,692 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:12,692 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:12,709 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:12,893 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 09:16:12,893 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:12,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-13 09:16:12,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:12,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188315421] [2024-09-13 09:16:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 09:16:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 09:16:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 09:16:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 09:16:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 09:16:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 09:16:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 09:16:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 09:16:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 09:16:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-13 09:16:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-13 09:16:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188315421] [2024-09-13 09:16:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188315421] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:13,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:13,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:13,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558336789] [2024-09-13 09:16:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:13,033 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:13,034 INFO L87 Difference]: Start difference. First operand 255 states and 383 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 09:16:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:13,183 INFO L93 Difference]: Finished difference Result 329 states and 496 transitions. [2024-09-13 09:16:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:16:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-13 09:16:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:13,188 INFO L225 Difference]: With dead ends: 329 [2024-09-13 09:16:13,188 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 09:16:13,191 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:13,192 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:13,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 09:16:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 204. [2024-09-13 09:16:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 105 states have internal predecessors, (121), 88 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2024-09-13 09:16:13,263 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 99 [2024-09-13 09:16:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:13,263 INFO L474 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2024-09-13 09:16:13,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 09:16:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2024-09-13 09:16:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-13 09:16:13,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:13,265 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:13,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 09:16:13,266 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:13,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-13 09:16:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:13,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741603148] [2024-09-13 09:16:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:13,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197026880] [2024-09-13 09:16:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:13,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:16:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 09:16:13,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 09:16:14,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:14,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:14,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741603148] [2024-09-13 09:16:14,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:14,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197026880] [2024-09-13 09:16:14,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197026880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:14,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:14,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 09:16:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368207712] [2024-09-13 09:16:14,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:14,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:16:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:16:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:16:14,787 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 09:16:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:15,557 INFO L93 Difference]: Finished difference Result 216 states and 304 transitions. [2024-09-13 09:16:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 09:16:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-13 09:16:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:15,560 INFO L225 Difference]: With dead ends: 216 [2024-09-13 09:16:15,560 INFO L226 Difference]: Without dead ends: 214 [2024-09-13 09:16:15,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-13 09:16:15,561 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:15,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 385 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:16:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-13 09:16:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2024-09-13 09:16:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 111 states have internal predecessors, (127), 88 states have call successors, (88), 16 states have call predecessors, (88), 15 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 300 transitions. [2024-09-13 09:16:15,647 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 300 transitions. Word has length 106 [2024-09-13 09:16:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:15,647 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 300 transitions. [2024-09-13 09:16:15,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 09:16:15,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 300 transitions. [2024-09-13 09:16:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 09:16:15,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:15,649 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:15,665 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 09:16:15,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:15,854 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-13 09:16:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990097186] [2024-09-13 09:16:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 09:16:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 09:16:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 09:16:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 09:16:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 09:16:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 09:16:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 09:16:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 09:16:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 09:16:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 09:16:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 09:16:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 09:16:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 09:16:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 09:16:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 09:16:16,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990097186] [2024-09-13 09:16:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990097186] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312868219] [2024-09-13 09:16:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:16,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:16,024 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:16,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:16:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:16,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:16:16,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-13 09:16:16,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 09:16:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312868219] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:16,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:16,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-13 09:16:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820470908] [2024-09-13 09:16:16,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:16,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:16:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:16:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:16,217 INFO L87 Difference]: Start difference. First operand 212 states and 300 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 09:16:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:16,493 INFO L93 Difference]: Finished difference Result 252 states and 359 transitions. [2024-09-13 09:16:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:16:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-13 09:16:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:16,496 INFO L225 Difference]: With dead ends: 252 [2024-09-13 09:16:16,496 INFO L226 Difference]: Without dead ends: 239 [2024-09-13 09:16:16,497 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:16:16,497 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:16,498 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-13 09:16:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 196. [2024-09-13 09:16:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-13 09:16:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-13 09:16:16,589 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-13 09:16:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:16,590 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-13 09:16:16,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 09:16:16,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-13 09:16:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 09:16:16,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:16,592 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-09-13 09:16:16,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 09:16:16,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 09:16:16,793 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:16,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-13 09:16:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:16,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36218185] [2024-09-13 09:16:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:16,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:16,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707962435] [2024-09-13 09:16:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:16,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:16,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:16,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:16:16,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:16,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 09:16:16,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 09:16:17,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:17,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36218185] [2024-09-13 09:16:17,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707962435] [2024-09-13 09:16:17,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707962435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:17,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 09:16:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977518620] [2024-09-13 09:16:17,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:17,285 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 09:16:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 09:16:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:16:17,286 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 09:16:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:17,541 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-13 09:16:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:16:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-13 09:16:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:17,543 INFO L225 Difference]: With dead ends: 230 [2024-09-13 09:16:17,543 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 09:16:17,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:16:17,544 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:17,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 321 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 09:16:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-13 09:16:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 09:16:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-13 09:16:17,614 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-13 09:16:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:17,615 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-13 09:16:17,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 09:16:17,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-13 09:16:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-13 09:16:17,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:17,617 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:17,634 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:17,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 09:16:17,818 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:17,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-13 09:16:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303665631] [2024-09-13 09:16:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969657006] [2024-09-13 09:16:17,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:16:17,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:17,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:17,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 09:16:17,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:16:17,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:17,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 09:16:17,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 09:16:18,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 09:16:18,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:18,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303665631] [2024-09-13 09:16:18,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969657006] [2024-09-13 09:16:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969657006] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:18,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:18,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 09:16:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634128568] [2024-09-13 09:16:18,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:18,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 09:16:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:18,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 09:16:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:16:18,779 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 09:16:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:20,217 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-13 09:16:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:16:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-13 09:16:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:20,219 INFO L225 Difference]: With dead ends: 253 [2024-09-13 09:16:20,219 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 09:16:20,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-13 09:16:20,220 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:20,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 510 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 09:16:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 09:16:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-13 09:16:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 09:16:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-13 09:16:20,328 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-13 09:16:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:20,329 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-13 09:16:20,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 09:16:20,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-13 09:16:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 09:16:20,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:20,331 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:20,347 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:20,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 09:16:20,535 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:20,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-13 09:16:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:20,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950396239] [2024-09-13 09:16:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:20,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523734273] [2024-09-13 09:16:20,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:16:20,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:20,557 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 09:16:20,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:16:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:20,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 09:16:20,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 09:16:21,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:39,153 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:16:47,705 WARN L293 SmtUtils]: Spent 8.47s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:16:53,417 WARN L293 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:17:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 09:17:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:17:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950396239] [2024-09-13 09:17:26,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:17:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523734273] [2024-09-13 09:17:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523734273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:17:26,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:17:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-13 09:17:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752707489] [2024-09-13 09:17:26,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:17:26,160 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:17:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:17:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:17:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=390, Unknown=1, NotChecked=0, Total=506 [2024-09-13 09:17:26,161 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 09:17:49,242 WARN L293 SmtUtils]: Spent 20.43s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:17:54,503 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:17:59,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:18:21,127 WARN L293 SmtUtils]: Spent 17.85s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:18:23,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:18:36,154 WARN L293 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:18:40,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:18:53,528 WARN L293 SmtUtils]: Spent 11.83s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:18:58,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:19:08,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:19:12,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:19:16,219 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 [] [2024-09-13 09:19:29,129 WARN L293 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:19:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:19:33,603 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-13 09:19:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 09:19:33,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-13 09:19:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:19:33,606 INFO L225 Difference]: With dead ends: 318 [2024-09-13 09:19:33,606 INFO L226 Difference]: Without dead ends: 316 [2024-09-13 09:19:33,607 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 112.9s TimeCoverageRelationStatistics Valid=399, Invalid=1080, Unknown=3, NotChecked=0, Total=1482 [2024-09-13 09:19:33,608 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 72 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 102 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:19:33,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 481 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 520 Invalid, 5 Unknown, 0 Unchecked, 34.0s Time] [2024-09-13 09:19:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-13 09:19:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-13 09:19:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-13 09:19:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-13 09:19:33,902 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-13 09:19:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:19:33,902 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-13 09:19:33,902 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 09:19:33,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:19:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-13 09:19:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-13 09:19:33,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:19:33,904 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2024-09-13 09:19:33,919 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 09:19:34,104 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 09:19:34,105 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:19:34,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:19:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-13 09:19:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:19:34,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949091342] [2024-09-13 09:19:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:19:34,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:19:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:19:34,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13950897] [2024-09-13 09:19:34,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:19:34,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:19:34,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:19:34,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:19:34,127 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 09:19:34,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 09:19:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:19:34,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-13 09:19:34,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:19:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-13 09:19:35,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:19:55,073 WARN L293 SmtUtils]: Spent 6.63s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:20:07,571 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)