./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --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 04d6fb36 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/divbin_unwindbound5.i -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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:08:59,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:08:59,780 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:08:59,785 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:08:59,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:08:59,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:08:59,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:08:59,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:08:59,814 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:08:59,817 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:08:59,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:08:59,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:08:59,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:08:59,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:08:59,820 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:08:59,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:08:59,821 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:08:59,821 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:08:59,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:08:59,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:08:59,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:08:59,823 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:08:59,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:08:59,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:08:59,823 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:08:59,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:08:59,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:08:59,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:08:59,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:08:59,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:08:59,829 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:08:59,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:08:59,830 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:08:59,830 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:08:59,830 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:08:59,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:08:59,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:09:00,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:09:00,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:09:00,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:09:00,096 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:09:00,096 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:09:00,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-15 19:09:01,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:09:01,770 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:09:01,773 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-15 19:09:01,780 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c35e80006/07c1d92471164cf7861c830f66b6b746/FLAG7f45849ba [2024-09-15 19:09:01,794 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c35e80006/07c1d92471164cf7861c830f66b6b746 [2024-09-15 19:09:01,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:09:01,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:09:01,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:09:01,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:09:01,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:09:01,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:09:01" (1/1) ... [2024-09-15 19:09:01,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226eb680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:01, skipping insertion in model container [2024-09-15 19:09:01,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:09:01" (1/1) ... [2024-09-15 19:09:01,825 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:09:01,958 WARN L248 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/divbin_unwindbound5.i[950,963] [2024-09-15 19:09:01,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:09:01,982 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:09:01,993 WARN L248 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/divbin_unwindbound5.i[950,963] [2024-09-15 19:09:02,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:09:02,013 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:09:02,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02 WrapperNode [2024-09-15 19:09:02,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:09:02,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:09:02,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:09:02,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:09:02,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,032 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:09:02,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:09:02,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:09:02,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:09:02,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:09:02,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,047 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,062 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]. [2024-09-15 19:09:02,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,071 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:09:02,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:09:02,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:09:02,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:09:02,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (1/1) ... [2024-09-15 19:09:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:09:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:02,111 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) [2024-09-15 19:09:02,116 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 [2024-09-15 19:09:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:09:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:09:02,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:09:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:09:02,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:09:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:09:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:09:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:09:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:09:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:09:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:09:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:09:02,195 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:09:02,197 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:09:02,351 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:09:02,351 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:09:02,372 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:09:02,372 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:09:02,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:09:02 BoogieIcfgContainer [2024-09-15 19:09:02,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:09:02,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:09:02,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:09:02,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:09:02,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:09:01" (1/3) ... [2024-09-15 19:09:02,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b678ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:09:02, skipping insertion in model container [2024-09-15 19:09:02,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:09:02" (2/3) ... [2024-09-15 19:09:02,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b678ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:09:02, skipping insertion in model container [2024-09-15 19:09:02,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:09:02" (3/3) ... [2024-09-15 19:09:02,381 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2024-09-15 19:09:02,393 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:09:02,393 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:09:02,443 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:09:02,448 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;@30c3d492, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:09:02,449 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:09:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:09:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 19:09:02,458 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:02,459 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:02,459 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:02,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1602480078, now seen corresponding path program 1 times [2024-09-15 19:09:02,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:02,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78320352] [2024-09-15 19:09:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:02,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:02,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:02,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78320352] [2024-09-15 19:09:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78320352] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:09:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:09:02,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:09:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646937163] [2024-09-15 19:09:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:09:02,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:09:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:09:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:09:02,669 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:02,736 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2024-09-15 19:09:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:09:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-15 19:09:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:02,747 INFO L225 Difference]: With dead ends: 57 [2024-09-15 19:09:02,747 INFO L226 Difference]: Without dead ends: 28 [2024-09-15 19:09:02,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:09:02,753 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:02,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:09:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-15 19:09:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-15 19:09:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:09:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-15 19:09:02,787 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2024-09-15 19:09:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:02,788 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-15 19:09:02,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:02,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-15 19:09:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:09:02,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:02,790 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:02,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:09:02,791 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:02,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 610811680, now seen corresponding path program 1 times [2024-09-15 19:09:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:02,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206543465] [2024-09-15 19:09:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:02,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:02,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:03,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206543465] [2024-09-15 19:09:03,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206543465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:09:03,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:09:03,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:09:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798407006] [2024-09-15 19:09:03,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:09:03,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:09:03,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:09:03,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:09:03,031 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:03,114 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-15 19:09:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:09:03,115 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-15 19:09:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:03,116 INFO L225 Difference]: With dead ends: 41 [2024-09-15 19:09:03,116 INFO L226 Difference]: Without dead ends: 29 [2024-09-15 19:09:03,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:09:03,120 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:03,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:09:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-15 19:09:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-15 19:09:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:09:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-15 19:09:03,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2024-09-15 19:09:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:03,133 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-15 19:09:03,133 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:03,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-15 19:09:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 19:09:03,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:03,134 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:03,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:09:03,134 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:03,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1424295131, now seen corresponding path program 1 times [2024-09-15 19:09:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:03,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787594055] [2024-09-15 19:09:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:03,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787594055] [2024-09-15 19:09:03,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787594055] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:09:03,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:09:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 19:09:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462396902] [2024-09-15 19:09:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:09:03,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:09:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:09:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:09:03,290 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:03,351 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-09-15 19:09:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:09:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-15 19:09:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:03,353 INFO L225 Difference]: With dead ends: 40 [2024-09-15 19:09:03,353 INFO L226 Difference]: Without dead ends: 33 [2024-09-15 19:09:03,353 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:09:03,354 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:03,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:09:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-15 19:09:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-15 19:09:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:09:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-15 19:09:03,359 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2024-09-15 19:09:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:03,360 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-15 19:09:03,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:09:03,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-15 19:09:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 19:09:03,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:03,361 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:03,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:09:03,361 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:03,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1426082591, now seen corresponding path program 1 times [2024-09-15 19:09:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570553280] [2024-09-15 19:09:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:09:03,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949059107] [2024-09-15 19:09:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:03,377 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) [2024-09-15 19:09:03,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:09:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:09:03,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:03,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:09:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570553280] [2024-09-15 19:09:03,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:09:03,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949059107] [2024-09-15 19:09:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949059107] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:09:03,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:09:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:09:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638807874] [2024-09-15 19:09:03,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:09:03,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:09:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:09:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:09:03,507 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:09:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:03,544 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-09-15 19:09:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:09:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-15 19:09:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:03,545 INFO L225 Difference]: With dead ends: 44 [2024-09-15 19:09:03,545 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 19:09:03,546 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:09:03,546 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:03,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:09:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 19:09:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-15 19:09:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:09:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-09-15 19:09:03,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2024-09-15 19:09:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:03,553 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-09-15 19:09:03,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:09:03,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-09-15 19:09:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:09:03,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:03,554 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:09:03,755 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:03,755 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:03,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1945714758, now seen corresponding path program 1 times [2024-09-15 19:09:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:03,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693750222] [2024-09-15 19:09:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:09:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:03,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693750222] [2024-09-15 19:09:03,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693750222] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:09:03,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424969200] [2024-09-15 19:09:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:03,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:03,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:03,892 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) [2024-09-15 19:09:03,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:09:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:03,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:09:03,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:03,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:09:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424969200] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:09:04,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:09:04,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-15 19:09:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848114232] [2024-09-15 19:09:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:09:04,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 19:09:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 19:09:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:09:04,084 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-15 19:09:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:04,318 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2024-09-15 19:09:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:09:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 34 [2024-09-15 19:09:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:04,320 INFO L225 Difference]: With dead ends: 111 [2024-09-15 19:09:04,320 INFO L226 Difference]: Without dead ends: 104 [2024-09-15 19:09:04,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:09:04,321 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:04,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:09:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-15 19:09:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2024-09-15 19:09:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:09:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2024-09-15 19:09:04,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 34 [2024-09-15 19:09:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:04,342 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2024-09-15 19:09:04,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-15 19:09:04,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2024-09-15 19:09:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:09:04,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:04,344 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:04,368 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:09:04,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:04,545 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:04,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1947502218, now seen corresponding path program 1 times [2024-09-15 19:09:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761412446] [2024-09-15 19:09:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:09:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:09:04,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:04,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761412446] [2024-09-15 19:09:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761412446] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:09:04,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:09:04,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 19:09:04,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442194269] [2024-09-15 19:09:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:09:04,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 19:09:04,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 19:09:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 19:09:04,750 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:09:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:04,835 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2024-09-15 19:09:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:09:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-15 19:09:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:04,837 INFO L225 Difference]: With dead ends: 145 [2024-09-15 19:09:04,837 INFO L226 Difference]: Without dead ends: 75 [2024-09-15 19:09:04,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:09:04,839 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:04,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:09:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-15 19:09:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-15 19:09:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:09:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-09-15 19:09:04,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 34 [2024-09-15 19:09:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:04,859 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-09-15 19:09:04,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:09:04,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-09-15 19:09:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:09:04,862 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:04,862 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:04,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 19:09:04,862 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:04,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1464105851, now seen corresponding path program 1 times [2024-09-15 19:09:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706825593] [2024-09-15 19:09:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:09:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 19:09:04,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:04,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706825593] [2024-09-15 19:09:04,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706825593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:09:04,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762869112] [2024-09-15 19:09:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:04,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:04,953 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) [2024-09-15 19:09:04,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:09:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:04,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:09:04,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 19:09:05,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:09:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 19:09:05,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762869112] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:09:05,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:09:05,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-15 19:09:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198905814] [2024-09-15 19:09:05,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:09:05,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:09:05,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:09:05,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:09:05,083 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:09:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:05,178 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2024-09-15 19:09:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:09:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 36 [2024-09-15 19:09:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:05,179 INFO L225 Difference]: With dead ends: 128 [2024-09-15 19:09:05,179 INFO L226 Difference]: Without dead ends: 77 [2024-09-15 19:09:05,180 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:09:05,180 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:05,180 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:09:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-15 19:09:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-15 19:09:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 60 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:09:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2024-09-15 19:09:05,191 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 36 [2024-09-15 19:09:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:05,191 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2024-09-15 19:09:05,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:09:05,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2024-09-15 19:09:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 19:09:05,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:05,192 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-15 19:09:05,205 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:09:05,396 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:09:05,397 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:05,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1516658666, now seen corresponding path program 1 times [2024-09-15 19:09:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442532662] [2024-09-15 19:09:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:09:05,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609466155] [2024-09-15 19:09:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:05,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:05,439 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) [2024-09-15 19:09:05,440 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:09:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:05,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 19:09:05,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 19:09:05,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:09:15,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442532662] [2024-09-15 19:09:15,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:09:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609466155] [2024-09-15 19:09:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609466155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:09:15,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:09:15,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-15 19:09:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042763656] [2024-09-15 19:09:15,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:09:15,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:09:15,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:15,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:09:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=101, Unknown=2, NotChecked=0, Total=132 [2024-09-15 19:09:15,795 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:09:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:15,883 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2024-09-15 19:09:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:09:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-15 19:09:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:15,884 INFO L225 Difference]: With dead ends: 90 [2024-09-15 19:09:15,884 INFO L226 Difference]: Without dead ends: 86 [2024-09-15 19:09:15,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=35, Invalid=119, Unknown=2, NotChecked=0, Total=156 [2024-09-15 19:09:15,885 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:15,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:09:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-15 19:09:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2024-09-15 19:09:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:09:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-09-15 19:09:15,903 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 37 [2024-09-15 19:09:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:15,904 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-09-15 19:09:15,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:09:15,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-09-15 19:09:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:09:15,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:15,906 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:15,918 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:09:16,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:16,106 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:16,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1803442657, now seen corresponding path program 2 times [2024-09-15 19:09:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359660893] [2024-09-15 19:09:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:09:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:09:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:09:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 19:09:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:09:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:09:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:09:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359660893] [2024-09-15 19:09:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359660893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:09:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096889172] [2024-09-15 19:09:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:09:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:16,592 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) [2024-09-15 19:09:16,593 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:09:16,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:09:16,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:09:16,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 19:09:16,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:09:17,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:09:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:09:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096889172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:09:18,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:09:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 24 [2024-09-15 19:09:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482380075] [2024-09-15 19:09:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:09:18,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:09:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:09:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:09:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:09:18,450 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 19:09:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:09:19,365 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2024-09-15 19:09:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:09:19,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 46 [2024-09-15 19:09:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:09:19,366 INFO L225 Difference]: With dead ends: 118 [2024-09-15 19:09:19,366 INFO L226 Difference]: Without dead ends: 65 [2024-09-15 19:09:19,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:09:19,367 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:09:19,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 245 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:09:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-15 19:09:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-09-15 19:09:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:09:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-09-15 19:09:19,383 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 46 [2024-09-15 19:09:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:09:19,385 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-09-15 19:09:19,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 19:09:19,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-09-15 19:09:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 19:09:19,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:09:19,388 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:09:19,407 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:09:19,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:19,593 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:09:19,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:09:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 182266171, now seen corresponding path program 1 times [2024-09-15 19:09:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:09:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152204505] [2024-09-15 19:09:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:09:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:09:19,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474831866] [2024-09-15 19:09:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:09:19,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:09:19,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:09:19,626 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) [2024-09-15 19:09:19,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:09:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:09:20,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 19:09:20,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:09:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:09:21,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:10:53,397 WARN L293 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:10:59,769 WARN L293 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:12:00,510 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:12:13,752 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:13:25,207 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~b~0 2147483648))) (or (= (mod c_main_~B~0 4294967296) .cse0) (let ((.cse8 (* c_main_~b~0 c_main_~q~0))) (let ((.cse5 (* 2 .cse0)) (.cse3 (mod .cse8 2147483648)) (.cse6 (div .cse0 2))) (let ((.cse1 (not (= (mod (+ (* 2147483647 c_main_~q~0 .cse0) .cse8) 2147483648) 0))) (.cse2 (= (* .cse3 2) (mod (+ (* c_main_~q~0 .cse6 4) (* (mod c_main_~b~0 2) 4294967295)) 4294967296))) (.cse7 (< .cse5 (+ (mod c_main_~b~0 4294967296) 1)))) (and (or .cse1 .cse2 (< .cse3 1) (< (let ((.cse4 (mod (* c_main_~q~0 .cse0) 2147483648))) (+ (* (div (+ (- 2147483649) .cse4 .cse0) 2147483648) 4294967296) (mod (* 4294967295 .cse0) 4294967296) (* (div (+ .cse3 (* (- 1) .cse4)) 2147483648) 4294967296) .cse5)) (+ .cse6 4294967297)) .cse7) (or .cse1 .cse2 .cse7))))))) is different from false [2024-09-15 19:13:42,497 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~b~0 c_main_~q~0)) (.cse0 (mod c_main_~b~0 2147483648))) (or (= (mod c_main_~B~0 4294967296) .cse0) (not (= (mod (+ (* 2147483647 c_main_~q~0 .cse0) .cse1) 2147483648) 0)) (= (* (mod .cse1 2147483648) 2) (mod (+ (* c_main_~q~0 (div .cse0 2) 4) (* (mod c_main_~b~0 2) 4294967295)) 4294967296)) (< (* 2 .cse0) (+ (mod c_main_~b~0 4294967296) 1)))) is different from false