./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/hard-u_valuebound2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --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 19:28:22,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:28:23,052 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:28:23,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:28:23,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:28:23,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:28:23,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:28:23,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:28:23,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:28:23,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:28:23,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:28:23,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:28:23,099 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:28:23,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:28:23,103 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:28:23,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:28:23,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:28:23,104 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:28:23,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:28:23,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:28:23,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:28:23,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:28:23,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:28:23,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:28:23,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:28:23,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:28:23,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:28:23,110 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:28:23,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:28:23,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:28:23,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:28:23,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:28:23,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:28:23,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:28:23,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:28:23,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:28:23,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:28:23,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:28:23,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:28:23,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:28:23,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:28:23,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:28:23,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:28:23,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:28:23,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:28:23,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:28:23,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:28:23,478 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:28:23,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2024-09-15 19:28:24,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:28:25,114 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:28:25,115 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2024-09-15 19:28:25,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0cabc691a/9ee57cd22c254837aef431f1a62cbfd7/FLAG8bfa74e81 [2024-09-15 19:28:25,142 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0cabc691a/9ee57cd22c254837aef431f1a62cbfd7 [2024-09-15 19:28:25,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:28:25,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:28:25,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:28:25,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:28:25,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:28:25,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d64032e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25, skipping insertion in model container [2024-09-15 19:28:25,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:28:25,348 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/hard-u_valuebound2.c[537,550] [2024-09-15 19:28:25,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:28:25,386 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:28:25,412 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/hard-u_valuebound2.c[537,550] [2024-09-15 19:28:25,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:28:25,440 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:28:25,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25 WrapperNode [2024-09-15 19:28:25,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:28:25,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:28:25,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:28:25,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:28:25,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,463 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:28:25,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:28:25,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:28:25,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:28:25,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:28:25,474 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,476 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,492 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 19:28:25,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,507 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:28:25,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:28:25,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:28:25,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:28:25,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (1/1) ... [2024-09-15 19:28:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:28:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:25,553 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 19:28:25,556 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 19:28:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:28:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:28:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:28:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:28:25,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:28:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:28:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:28:25,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:28:25,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:28:25,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:28:25,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:28:25,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:28:25,675 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:28:25,679 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:28:25,868 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:28:25,868 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:28:25,894 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:28:25,894 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:28:25,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:28:25 BoogieIcfgContainer [2024-09-15 19:28:25,896 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:28:25,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:28:25,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:28:25,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:28:25,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:28:25" (1/3) ... [2024-09-15 19:28:25,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aecdb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:28:25, skipping insertion in model container [2024-09-15 19:28:25,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:28:25" (2/3) ... [2024-09-15 19:28:25,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aecdb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:28:25, skipping insertion in model container [2024-09-15 19:28:25,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:28:25" (3/3) ... [2024-09-15 19:28:25,904 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2024-09-15 19:28:25,918 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:28:25,918 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:28:25,980 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:28:25,986 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;@73e575df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:28:25,986 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:28:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:28:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:28:25,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:25,999 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:26,000 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-15 19:28:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615049808] [2024-09-15 19:28:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:28:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:28:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:28:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:28:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:28:26,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615049808] [2024-09-15 19:28:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615049808] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:28:26,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:28:26,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:28:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124788580] [2024-09-15 19:28:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:28:26,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:28:26,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:28:26,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:28:26,244 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 19:28:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:26,283 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-15 19:28:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:28:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 27 [2024-09-15 19:28:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:26,293 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:28:26,293 INFO L226 Difference]: Without dead ends: 32 [2024-09-15 19:28:26,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:28:26,303 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:26,304 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:28:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-15 19:28:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-15 19:28:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:28:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-15 19:28:26,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-15 19:28:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:26,348 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-15 19:28:26,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 19:28:26,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-15 19:28:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:28:26,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:26,351 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:26,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:28:26,352 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-15 19:28:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:26,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975859122] [2024-09-15 19:28:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:26,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:28:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:28:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:28:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:28:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:28:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975859122] [2024-09-15 19:28:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975859122] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:28:26,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:28:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:28:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021306115] [2024-09-15 19:28:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:28:26,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:28:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:28:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:28:26,645 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:28:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:26,711 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-15 19:28:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:28:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-15 19:28:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:26,713 INFO L225 Difference]: With dead ends: 45 [2024-09-15 19:28:26,714 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 19:28:26,714 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 19:28:26,717 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:26,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:28:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 19:28:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-15 19:28:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:28:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-15 19:28:26,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-15 19:28:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:26,737 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-15 19:28:26,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:28:26,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-15 19:28:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:28:26,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:26,739 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:26,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:28:26,740 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:26,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-15 19:28:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413651321] [2024-09-15 19:28:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:28:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:28:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:28:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:28:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:28:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:28:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413651321] [2024-09-15 19:28:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413651321] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:28:27,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:28:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:28:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443633795] [2024-09-15 19:28:27,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:28:27,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:28:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:28:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:28:27,076 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:28:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:27,211 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-15 19:28:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:28:27,212 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-15 19:28:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:27,213 INFO L225 Difference]: With dead ends: 49 [2024-09-15 19:28:27,213 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 19:28:27,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 19:28:27,215 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:27,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:28:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 19:28:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-15 19:28:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:28:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-15 19:28:27,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-15 19:28:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:27,233 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-15 19:28:27,233 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:28:27,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-15 19:28:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 19:28:27,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:27,234 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:27,235 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:28:27,235 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:27,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-15 19:28:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:27,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441712674] [2024-09-15 19:28:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:28:27,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703981143] [2024-09-15 19:28:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:27,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:27,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:27,274 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 19:28:27,275 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 19:28:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:27,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-15 19:28:27,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:28:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 19:28:27,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:28:27,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:27,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441712674] [2024-09-15 19:28:27,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:28:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703981143] [2024-09-15 19:28:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703981143] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:28:27,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:28:27,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 19:28:27,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975487954] [2024-09-15 19:28:27,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:28:27,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:28:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:28:27,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:28:27,575 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-15 19:28:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:27,834 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-15 19:28:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:28:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-09-15 19:28:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:27,836 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:28:27,838 INFO L226 Difference]: Without dead ends: 53 [2024-09-15 19:28:27,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:28:27,840 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:27,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:28:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-15 19:28:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-15 19:28:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-15 19:28:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-15 19:28:27,865 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-15 19:28:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:27,865 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-15 19:28:27,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-15 19:28:27,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-15 19:28:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:28:27,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:27,867 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:27,886 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 19:28:28,067 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 19:28:28,068 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:28,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-15 19:28:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618813227] [2024-09-15 19:28:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:28,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:28:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357112021] [2024-09-15 19:28:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:28,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:28,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:28,115 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 19:28:28,120 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 19:28:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:28,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-15 19:28:28,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:28:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:28:28,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:28:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 19:28:29,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:29,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618813227] [2024-09-15 19:28:29,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:28:29,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357112021] [2024-09-15 19:28:29,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357112021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:28:29,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:28:29,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-09-15 19:28:29,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475118936] [2024-09-15 19:28:29,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:28:29,795 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:28:29,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:28:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:28:29,806 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-15 19:28:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:30,291 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-15 19:28:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:28:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2024-09-15 19:28:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:30,294 INFO L225 Difference]: With dead ends: 71 [2024-09-15 19:28:30,295 INFO L226 Difference]: Without dead ends: 63 [2024-09-15 19:28:30,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:28:30,296 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:30,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 188 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:28:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-15 19:28:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-15 19:28:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-15 19:28:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-09-15 19:28:30,318 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 44 [2024-09-15 19:28:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:30,319 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-09-15 19:28:30,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-15 19:28:30,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-09-15 19:28:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 19:28:30,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:30,321 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:30,337 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:28:30,525 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 19:28:30,526 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:30,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-15 19:28:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295693670] [2024-09-15 19:28:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:28:30,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606669255] [2024-09-15 19:28:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:30,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:30,566 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 19:28:30,568 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 19:28:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:30,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:28:30,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:28:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:28:30,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:28:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:28:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295693670] [2024-09-15 19:28:30,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:28:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606669255] [2024-09-15 19:28:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606669255] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:28:30,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:28:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-09-15 19:28:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926950820] [2024-09-15 19:28:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:28:30,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:28:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:28:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:28:30,909 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:28:35,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:28:39,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:28:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:39,118 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-15 19:28:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:28:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2024-09-15 19:28:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:39,120 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:28:39,120 INFO L226 Difference]: Without dead ends: 71 [2024-09-15 19:28:39,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:28:39,121 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:39,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-09-15 19:28:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-15 19:28:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-15 19:28:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 19:28:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-09-15 19:28:39,140 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 54 [2024-09-15 19:28:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:39,140 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-09-15 19:28:39,141 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:28:39,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-09-15 19:28:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-15 19:28:39,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:39,143 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:39,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:28:39,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:28:39,347 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:39,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -752924724, now seen corresponding path program 1 times [2024-09-15 19:28:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726192953] [2024-09-15 19:28:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:28:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:28:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:28:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:28:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:28:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:28:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:28:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:28:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:28:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:28:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:28:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:28:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-15 19:28:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:28:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726192953] [2024-09-15 19:28:39,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726192953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:28:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994915454] [2024-09-15 19:28:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:39,512 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 19:28:39,518 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 19:28:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:39,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 19:28:39,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:28:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-15 19:28:39,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:28:39,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994915454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:28:39,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:28:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-09-15 19:28:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819293753] [2024-09-15 19:28:39,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:28:39,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:28:39,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:28:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:28:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:28:39,750 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-15 19:28:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:28:40,039 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2024-09-15 19:28:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:28:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 72 [2024-09-15 19:28:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:28:40,041 INFO L225 Difference]: With dead ends: 102 [2024-09-15 19:28:40,041 INFO L226 Difference]: Without dead ends: 94 [2024-09-15 19:28:40,042 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:28:40,043 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:28:40,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:28:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-15 19:28:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-09-15 19:28:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-15 19:28:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-15 19:28:40,083 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 72 [2024-09-15 19:28:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:28:40,084 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-15 19:28:40,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-15 19:28:40,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-15 19:28:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-15 19:28:40,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:28:40,089 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:28:40,106 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 19:28:40,289 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:40,290 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:28:40,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:28:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-15 19:28:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:28:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708893589] [2024-09-15 19:28:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:28:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:28:40,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693267701] [2024-09-15 19:28:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:28:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:28:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:28:40,354 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 19:28:40,356 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 19:28:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:28:40,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 19:28:40,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:28:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 54 proven. 23 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-15 19:28:41,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:29:21,412 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:29:37,440 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:29:49,478 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_main_~d~0 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse3 (div .cse2 2)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse4 (mod c_main_~p~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse2)) (< (mod c_main_~r~0 4294967296) .cse3) (= .cse4 1) (= .cse0 (mod (+ (* 4294967295 .cse3) c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse4 2))) 4294967296))))) is different from true [2024-09-15 19:29:58,748 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:30:14,791 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:30:42,949 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:30:49,621 WARN L293 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:31:05,636 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:31:29,686 WARN L293 SmtUtils]: Spent 24.05s 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 19:31:45,712 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)