./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.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/dijkstra-u_valuebound10.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 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf --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 19:04:06,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:04:07,028 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:04:07,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:04:07,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:04:07,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:04:07,065 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:04:07,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:04:07,066 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:04:07,068 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:04:07,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:04:07,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:04:07,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:04:07,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:04:07,070 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:04:07,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:04:07,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:04:07,071 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:04:07,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:04:07,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:04:07,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:04:07,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:04:07,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:04:07,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:04:07,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:04:07,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:04:07,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:04:07,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:04:07,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:04:07,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:04:07,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:04:07,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:04:07,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:04:07,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:04:07,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:04:07,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:04:07,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:04:07,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:04:07,079 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:04:07,079 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:04:07,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:04:07,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:04:07,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:04:07,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:04:07,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:04:07,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:04:07,424 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:04:07,424 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:04:07,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-09-15 19:04:08,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:04:09,197 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:04:09,197 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-09-15 19:04:09,204 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8ab13c63d/4a251e1d9f0c4cbdbcea1b75e612784e/FLAG908a0f846 [2024-09-15 19:04:09,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8ab13c63d/4a251e1d9f0c4cbdbcea1b75e612784e [2024-09-15 19:04:09,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:04:09,554 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:04:09,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:04:09,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:04:09,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:04:09,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574413a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09, skipping insertion in model container [2024-09-15 19:04:09,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,583 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:04:09,737 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/dijkstra-u_valuebound10.c[525,538] [2024-09-15 19:04:09,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:04:09,793 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:04:09,804 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/dijkstra-u_valuebound10.c[525,538] [2024-09-15 19:04:09,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:04:09,846 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:04:09,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09 WrapperNode [2024-09-15 19:04:09,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:04:09,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:04:09,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:04:09,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:04:09,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,871 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,878 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:04:09,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:04:09,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:04:09,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:04:09,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:04:09,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,893 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,915 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 19:04:09,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:04:09,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:04:09,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:04:09,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:04:09,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (1/1) ... [2024-09-15 19:04:09,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:04:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:04:09,975 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 19:04:09,978 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 19:04:10,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:04:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:04:10,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:04:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:04:10,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:04:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:04:10,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:04:10,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:04:10,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:04:10,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:04:10,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:04:10,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:04:10,091 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:04:10,092 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:04:10,327 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:04:10,327 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:04:10,353 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:04:10,353 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:04:10,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:04:10 BoogieIcfgContainer [2024-09-15 19:04:10,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:04:10,358 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:04:10,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:04:10,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:04:10,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:04:09" (1/3) ... [2024-09-15 19:04:10,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7844109b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:04:10, skipping insertion in model container [2024-09-15 19:04:10,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:04:09" (2/3) ... [2024-09-15 19:04:10,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7844109b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:04:10, skipping insertion in model container [2024-09-15 19:04:10,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:04:10" (3/3) ... [2024-09-15 19:04:10,364 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2024-09-15 19:04:10,378 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:04:10,378 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:04:10,430 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:04:10,442 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;@36b0bc81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:04:10,442 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:04:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 19:04:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 19:04:10,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:04:10,455 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:04:10,455 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:04:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash 570623365, now seen corresponding path program 1 times [2024-09-15 19:04:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:04:10,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118223795] [2024-09-15 19:04:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:10,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:04:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:10,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:04:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:10,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:04:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:10,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:04:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:04:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118223795] [2024-09-15 19:04:10,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118223795] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:04:10,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:04:10,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:04:10,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319777926] [2024-09-15 19:04:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:04:10,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:04:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:04:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:04:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:04:10,700 INFO L87 Difference]: Start difference. First operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:04:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:04:10,735 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2024-09-15 19:04:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:04:10,741 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-15 19:04:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:04:10,748 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:04:10,748 INFO L226 Difference]: Without dead ends: 32 [2024-09-15 19:04:10,751 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 19:04:10,754 INFO L434 NwaCegarLoop]: 45 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, 45 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 19:04:10,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:04:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-15 19:04:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-15 19:04:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-15 19:04:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-09-15 19:04:10,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 22 [2024-09-15 19:04:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:04:10,798 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-09-15 19:04:10,798 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:04:10,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-09-15 19:04:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 19:04:10,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:04:10,800 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:04:10,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:04:10,803 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:04:10,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2095105318, now seen corresponding path program 1 times [2024-09-15 19:04:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:04:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257732588] [2024-09-15 19:04:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:04:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:11,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:04:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:11,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:04:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:11,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:04:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:11,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:04:11,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257732588] [2024-09-15 19:04:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257732588] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:04:11,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:04:11,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:04:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382769208] [2024-09-15 19:04:11,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:04:11,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:04:11,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:04:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:04:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:04:11,355 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:04:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:04:11,689 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2024-09-15 19:04:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:04:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-15 19:04:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:04:11,692 INFO L225 Difference]: With dead ends: 64 [2024-09-15 19:04:11,693 INFO L226 Difference]: Without dead ends: 46 [2024-09-15 19:04:11,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:04:11,696 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:04:11,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 184 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:04:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-15 19:04:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-15 19:04:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-15 19:04:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-09-15 19:04:11,723 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2024-09-15 19:04:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:04:11,723 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-09-15 19:04:11,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:04:11,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-09-15 19:04:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 19:04:11,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:04:11,726 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:04:11,727 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:04:11,727 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:04:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1429886677, now seen corresponding path program 1 times [2024-09-15 19:04:11,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:04:11,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418921595] [2024-09-15 19:04:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:11,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:04:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:12,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:04:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:12,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:04:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:12,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:04:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:12,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:04:12,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418921595] [2024-09-15 19:04:12,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418921595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:04:12,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290793812] [2024-09-15 19:04:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:12,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:04:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:04:12,097 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 19:04:12,099 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 19:04:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:12,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 19:04:12,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:04:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:12,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:04:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:12,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290793812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:04:12,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:04:12,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-15 19:04:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131250192] [2024-09-15 19:04:12,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:04:12,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:04:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:04:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:04:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:04:12,479 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:04:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:04:14,503 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-09-15 19:04:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 19:04:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-15 19:04:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:04:14,507 INFO L225 Difference]: With dead ends: 115 [2024-09-15 19:04:14,507 INFO L226 Difference]: Without dead ends: 97 [2024-09-15 19:04:14,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:04:14,509 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:04:14,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 304 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 19:04:14,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-15 19:04:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2024-09-15 19:04:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 19:04:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-09-15 19:04:14,533 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 25 [2024-09-15 19:04:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:04:14,534 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-09-15 19:04:14,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:04:14,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-09-15 19:04:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 19:04:14,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:04:14,536 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:04:14,554 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:04:14,741 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:04:14,742 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:04:14,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:14,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1189191834, now seen corresponding path program 1 times [2024-09-15 19:04:14,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:04:14,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929519761] [2024-09-15 19:04:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:04:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:04:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298626327] [2024-09-15 19:04:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:14,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:04:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:04:14,780 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 19:04:14,781 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 19:04:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:14,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:04:14,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:04:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:04:14,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:04:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:04:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929519761] [2024-09-15 19:04:14,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:04:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298626327] [2024-09-15 19:04:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298626327] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:04:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:04:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:04:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568839113] [2024-09-15 19:04:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:04:14,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:04:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:04:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:04:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:04:14,913 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:04:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:04:15,087 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2024-09-15 19:04:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:04:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 33 [2024-09-15 19:04:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:04:15,089 INFO L225 Difference]: With dead ends: 90 [2024-09-15 19:04:15,089 INFO L226 Difference]: Without dead ends: 87 [2024-09-15 19:04:15,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 19:04:15,091 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:04:15,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:04:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-15 19:04:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-15 19:04:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-15 19:04:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2024-09-15 19:04:15,111 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 33 [2024-09-15 19:04:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:04:15,111 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2024-09-15 19:04:15,111 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:04:15,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2024-09-15 19:04:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:04:15,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:04:15,113 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:04:15,133 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:04:15,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:04:15,314 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:04:15,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:04:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1682280212, now seen corresponding path program 1 times [2024-09-15 19:04:15,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:04:15,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544452600] [2024-09-15 19:04:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:04:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:04:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517201095] [2024-09-15 19:04:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:04:15,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:04:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:04:15,333 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 19:04:15,334 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 19:04:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:04:15,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:04:15,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:04:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:15,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:04:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:04:19,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:04:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544452600] [2024-09-15 19:04:19,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:04:19,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517201095] [2024-09-15 19:04:19,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517201095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:04:19,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:04:19,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-15 19:04:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48492617] [2024-09-15 19:04:19,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:04:19,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:04:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:04:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:04:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:04:19,095 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:04:32,919 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 19:04:34,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 19:04:38,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:04:39,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:04:41,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:04:45,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:04:50,413 WARN L539 Checker$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 19:04:54,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:04:58,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:05:02,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:05:06,770 WARN L539 Checker$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 19:05:10,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:05:15,147 WARN L539 Checker$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 19:05:16,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:05:20,753 WARN L539 Checker$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 19:05:24,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:05:29,559 WARN L539 Checker$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 19:05:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:05:29,575 INFO L93 Difference]: Finished difference Result 156 states and 226 transitions. [2024-09-15 19:05:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:05:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-09-15 19:05:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:05:29,577 INFO L225 Difference]: With dead ends: 156 [2024-09-15 19:05:29,577 INFO L226 Difference]: Without dead ends: 132 [2024-09-15 19:05:29,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:05:29,579 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 55 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2024-09-15 19:05:29,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 297 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 201 Invalid, 13 Unknown, 0 Unchecked, 60.7s Time] [2024-09-15 19:05:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-15 19:05:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2024-09-15 19:05:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-15 19:05:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2024-09-15 19:05:29,613 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 32 [2024-09-15 19:05:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:05:29,613 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2024-09-15 19:05:29,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:05:29,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2024-09-15 19:05:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:05:29,616 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:05:29,616 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:05:29,623 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 19:05:29,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:05:29,817 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:05:29,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:29,817 INFO L85 PathProgramCache]: Analyzing trace with hash -7962503, now seen corresponding path program 1 times [2024-09-15 19:05:29,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:05:29,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739997880] [2024-09-15 19:05:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:29,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:05:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:05:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:05:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:05:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 19:05:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 19:05:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 19:05:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 19:05:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:05:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739997880] [2024-09-15 19:05:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739997880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:05:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803645417] [2024-09-15 19:05:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:30,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:05:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:05:30,106 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 19:05:30,107 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 19:05:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:30,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:05:30,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:05:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-15 19:05:30,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:05:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 19:05:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803645417] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:05:30,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:05:30,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-15 19:05:30,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305801980] [2024-09-15 19:05:30,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:05:30,560 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:05:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:05:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:05:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:05:30,561 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-15 19:05:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:05:31,798 INFO L93 Difference]: Finished difference Result 177 states and 252 transitions. [2024-09-15 19:05:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:05:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 44 [2024-09-15 19:05:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:05:31,800 INFO L225 Difference]: With dead ends: 177 [2024-09-15 19:05:31,800 INFO L226 Difference]: Without dead ends: 135 [2024-09-15 19:05:31,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:05:31,802 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 84 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:05:31,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 245 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-15 19:05:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-15 19:05:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2024-09-15 19:05:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-15 19:05:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2024-09-15 19:05:31,833 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 44 [2024-09-15 19:05:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:05:31,833 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2024-09-15 19:05:31,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-15 19:05:31,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2024-09-15 19:05:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 19:05:31,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:05:31,836 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:05:31,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:05:32,040 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:05:32,041 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:05:32,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash -409333978, now seen corresponding path program 1 times [2024-09-15 19:05:32,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:05:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081893879] [2024-09-15 19:05:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:05:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:05:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465459108] [2024-09-15 19:05:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:32,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:05:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:05:32,096 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 19:05:32,100 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 19:05:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:32,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 19:05:32,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:05:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-15 19:05:32,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:05:40,630 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-15 19:05:44,681 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 4294967295 c_main_~n~0) c_main_~r~0 (* c_main_~p~0 c_main_~p~0)) 4294967296) 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* main_~q~0 main_~q~0 4294967295 c_main_~h~0) (* 4294967292 main_~q~0 main_~q~0 c_main_~p~0) (* main_~q~0 c_main_~r~0 12 c_main_~h~0) (* main_~q~0 16 c_main_~p~0 c_main_~n~0) (* c_main_~h~0 c_main_~h~0 c_main_~h~0) (* main_~q~0 c_main_~n~0 4294967284 c_main_~h~0) (* main_~q~0 c_main_~p~0 c_main_~r~0 4294967280)) 4294967296) 0)))) is different from false [2024-09-15 19:05:44,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:05:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081893879] [2024-09-15 19:05:44,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:05:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465459108] [2024-09-15 19:05:44,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465459108] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:05:44,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:05:44,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-15 19:05:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095740113] [2024-09-15 19:05:44,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:05:44,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:05:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:05:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:05:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2024-09-15 19:05:44,688 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-15 19:05:49,686 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 19:05:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:05:50,485 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2024-09-15 19:05:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:05:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2024-09-15 19:05:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:05:50,488 INFO L225 Difference]: With dead ends: 133 [2024-09-15 19:05:50,488 INFO L226 Difference]: Without dead ends: 111 [2024-09-15 19:05:50,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2024-09-15 19:05:50,491 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:05:50,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 157 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-15 19:05:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-15 19:05:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-09-15 19:05:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 50 states have call successors, (50), 10 states have call predecessors, (50), 9 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-15 19:05:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2024-09-15 19:05:50,510 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 59 [2024-09-15 19:05:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:05:50,510 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2024-09-15 19:05:50,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-15 19:05:50,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2024-09-15 19:05:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:05:50,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:05:50,513 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:05:50,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:05:50,717 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:05:50,718 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:05:50,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:05:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash 382001091, now seen corresponding path program 1 times [2024-09-15 19:05:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:05:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754764299] [2024-09-15 19:05:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:05:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:05:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:05:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:05:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:05:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 19:05:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 19:05:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 19:05:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 19:05:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:05:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 19:05:51,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:05:51,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754764299] [2024-09-15 19:05:51,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754764299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:05:51,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074931137] [2024-09-15 19:05:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:05:51,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:05:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:05:51,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:05:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:05:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:05:51,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-15 19:05:51,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:05:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:05:52,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:06:19,892 WARN L293 SmtUtils]: Spent 12.39s 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 19:06:40,647 WARN L293 SmtUtils]: Spent 20.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:06:56,805 WARN L293 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:07:17,005 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:07:25,039 WARN L293 SmtUtils]: Spent 8.03s 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 19:07:45,132 WARN L293 SmtUtils]: Spent 20.09s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:08:30,490 WARN L293 SmtUtils]: Spent 29.46s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:08:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074931137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:08:30,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:08:30,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2024-09-15 19:08:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641205107] [2024-09-15 19:08:30,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:08:30,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:08:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:08:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:08:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=508, Unknown=4, NotChecked=0, Total=600 [2024-09-15 19:08:30,494 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-15 19:08:35,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:08:39,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 19:08:43,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 19:08:44,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 19:08:48,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []