./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/dijkstra-u.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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/dijkstra-u.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 b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:51:58,137 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:51:58,207 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:51:58,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:51:58,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:51:58,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:51:58,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:51:58,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:51:58,236 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:51:58,236 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:51:58,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:51:58,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:51:58,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:51:58,239 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:51:58,239 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:51:58,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:51:58,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:51:58,240 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:51:58,240 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:51:58,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:51:58,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:51:58,245 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:51:58,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:51:58,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:51:58,249 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:51:58,249 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:51:58,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:51:58,250 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:51:58,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:51:58,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:51:58,251 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:51:58,251 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:51:58,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:51:58,251 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:51:58,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:51:58,252 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:51:58,252 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:51:58,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:51:58,254 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:51:58,254 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:51:58,254 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:51:58,255 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:51:58,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:51:58,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:51:58,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:51:58,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:51:58,533 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:51:58,533 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:51:58,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/dijkstra-u.c [2024-09-18 15:51:59,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:52:00,077 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:52:00,078 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/dijkstra-u.c [2024-09-18 15:52:00,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/066c4f90d/8d0effda35f74a119daa6a8e64e299de/FLAGf7fc14430 [2024-09-18 15:52:00,457 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/066c4f90d/8d0effda35f74a119daa6a8e64e299de [2024-09-18 15:52:00,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:52:00,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:52:00,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:00,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:52:00,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:52:00,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a6a009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00, skipping insertion in model container [2024-09-18 15:52:00,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,487 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:52:00,642 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/dijkstra-u.c[525,538] [2024-09-18 15:52:00,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:00,700 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:52:00,712 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/dijkstra-u.c[525,538] [2024-09-18 15:52:00,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:00,756 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:52:00,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00 WrapperNode [2024-09-18 15:52:00,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:00,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:00,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:52:00,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:52:00,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,784 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:52:00,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:00,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:52:00,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:52:00,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:52:00,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,818 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]. [2024-09-18 15:52:00,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:52:00,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:52:00,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:52:00,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:52:00,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (1/1) ... [2024-09-18 15:52:00,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:52:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:00,960 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) [2024-09-18 15:52:00,963 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 [2024-09-18 15:52:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:52:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:52:01,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:52:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:52:01,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:52:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:52:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:52:01,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:52:01,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:52:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:52:01,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:52:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:52:01,075 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:52:01,077 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:52:01,332 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:52:01,332 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:52:01,350 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:52:01,351 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:52:01,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:01 BoogieIcfgContainer [2024-09-18 15:52:01,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:52:01,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:52:01,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:52:01,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:52:01,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:52:00" (1/3) ... [2024-09-18 15:52:01,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f6ce8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:01, skipping insertion in model container [2024-09-18 15:52:01,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:00" (2/3) ... [2024-09-18 15:52:01,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f6ce8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:01, skipping insertion in model container [2024-09-18 15:52:01,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:01" (3/3) ... [2024-09-18 15:52:01,360 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2024-09-18 15:52:01,375 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:52:01,376 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:52:01,435 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:52:01,442 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;@41f1e96f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:52:01,443 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:52:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:52:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 15:52:01,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:01,456 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:01,457 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:01,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1413296547, now seen corresponding path program 1 times [2024-09-18 15:52:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550328394] [2024-09-18 15:52:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:01,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:01,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550328394] [2024-09-18 15:52:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550328394] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:01,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:01,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:52:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573001100] [2024-09-18 15:52:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:01,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:52:01,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:52:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:52:01,654 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:01,684 INFO L93 Difference]: Finished difference Result 62 states and 102 transitions. [2024-09-18 15:52:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:52:01,686 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-18 15:52:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:01,692 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:52:01,692 INFO L226 Difference]: Without dead ends: 31 [2024-09-18 15:52:01,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:52:01,700 INFO L434 NwaCegarLoop]: 43 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, 43 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 [2024-09-18 15:52:01,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-18 15:52:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-18 15:52:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:52:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-18 15:52:01,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2024-09-18 15:52:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:01,736 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-18 15:52:01,736 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:01,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-18 15:52:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 15:52:01,737 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:01,738 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:01,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:52:01,738 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:01,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1248341200, now seen corresponding path program 1 times [2024-09-18 15:52:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:01,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257930529] [2024-09-18 15:52:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:02,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:02,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257930529] [2024-09-18 15:52:02,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257930529] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:02,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:02,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:52:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578649149] [2024-09-18 15:52:02,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:02,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:52:02,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:02,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:52:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:02,260 INFO L87 Difference]: Start difference. First operand 31 states and 41 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:02,519 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2024-09-18 15:52:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:52:02,520 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-18 15:52:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:02,522 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:52:02,522 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:52:02,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:52:02,524 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:02,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 174 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:52:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:52:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:52:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:52:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-09-18 15:52:02,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 18 [2024-09-18 15:52:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:02,554 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-09-18 15:52:02,554 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:02,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-09-18 15:52:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:52:02,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:02,557 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:02,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:52:02,558 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1903651755, now seen corresponding path program 1 times [2024-09-18 15:52:02,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:02,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682243641] [2024-09-18 15:52:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:02,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:02,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682243641] [2024-09-18 15:52:02,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682243641] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543488014] [2024-09-18 15:52:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:02,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:02,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:02,962 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) [2024-09-18 15:52:02,964 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:52:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:03,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:52:03,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:03,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543488014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:03,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-18 15:52:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000658135] [2024-09-18 15:52:03,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:03,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:52:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:52:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:52:03,342 INFO L87 Difference]: Start difference. First operand 45 states and 61 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:04,720 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2024-09-18 15:52:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:52:04,721 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-18 15:52:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:04,724 INFO L225 Difference]: With dead ends: 114 [2024-09-18 15:52:04,725 INFO L226 Difference]: Without dead ends: 96 [2024-09-18 15:52:04,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:52:04,729 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:04,730 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 279 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 15:52:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-18 15:52:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2024-09-18 15:52:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-18 15:52:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2024-09-18 15:52:04,777 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 20 [2024-09-18 15:52:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:04,777 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2024-09-18 15:52:04,777 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:52:04,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2024-09-18 15:52:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:52:04,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:04,779 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:04,797 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:52:04,980 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 [2024-09-18 15:52:04,980 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:04,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1142714768, now seen corresponding path program 1 times [2024-09-18 15:52:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786144335] [2024-09-18 15:52:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:05,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870452522] [2024-09-18 15:52:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:05,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:05,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:05,017 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) [2024-09-18 15:52:05,020 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:52:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:05,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:52:05,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:05,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786144335] [2024-09-18 15:52:05,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870452522] [2024-09-18 15:52:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870452522] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:05,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033725818] [2024-09-18 15:52:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:05,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:05,127 INFO L87 Difference]: Start difference. First operand 64 states and 89 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:05,237 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2024-09-18 15:52:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:05,237 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-18 15:52:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:05,240 INFO L225 Difference]: With dead ends: 89 [2024-09-18 15:52:05,242 INFO L226 Difference]: Without dead ends: 86 [2024-09-18 15:52:05,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:05,243 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:05,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-18 15:52:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-18 15:52:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-18 15:52:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2024-09-18 15:52:05,273 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 28 [2024-09-18 15:52:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:05,274 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2024-09-18 15:52:05,274 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:05,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2024-09-18 15:52:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:52:05,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:05,276 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:05,294 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:52:05,477 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 [2024-09-18 15:52:05,477 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:05,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1314960995, now seen corresponding path program 1 times [2024-09-18 15:52:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644793001] [2024-09-18 15:52:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292646786] [2024-09-18 15:52:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:05,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:05,496 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) [2024-09-18 15:52:05,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:52:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:05,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:52:05,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:05,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:07,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644793001] [2024-09-18 15:52:07,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292646786] [2024-09-18 15:52:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292646786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:07,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:07,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-18 15:52:07,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348470388] [2024-09-18 15:52:07,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:07,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:52:07,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:07,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:52:07,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:52:07,806 INFO L87 Difference]: Start difference. First operand 86 states and 121 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-18 15:52:18,664 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 [] [2024-09-18 15:52:24,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:29,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:31,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:36,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:40,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:44,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:48,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:52,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:52:57,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:01,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:05,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:07,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:11,596 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 [] [2024-09-18 15:53:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:12,329 INFO L93 Difference]: Finished difference Result 155 states and 224 transitions. [2024-09-18 15:53:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:53:12,330 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-09-18 15:53:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:12,332 INFO L225 Difference]: With dead ends: 155 [2024-09-18 15:53:12,332 INFO L226 Difference]: Without dead ends: 131 [2024-09-18 15:53:12,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:53:12,334 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 51 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:12,334 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 322 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 209 Invalid, 12 Unknown, 0 Unchecked, 57.9s Time] [2024-09-18 15:53:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-18 15:53:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-09-18 15:53:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 56 states have call successors, (56), 11 states have call predecessors, (56), 10 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 15:53:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2024-09-18 15:53:12,371 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 27 [2024-09-18 15:53:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:12,372 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2024-09-18 15:53:12,372 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-18 15:53:12,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2024-09-18 15:53:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:53:12,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:12,374 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:12,382 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:12,575 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 [2024-09-18 15:53:12,576 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:12,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2083654722, now seen corresponding path program 1 times [2024-09-18 15:53:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:12,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477908560] [2024-09-18 15:53:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285796381] [2024-09-18 15:53:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:12,629 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) [2024-09-18 15:53:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:53:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:12,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:53:12,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:53:12,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:53:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477908560] [2024-09-18 15:53:12,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285796381] [2024-09-18 15:53:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285796381] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:12,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:12,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 15:53:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820078163] [2024-09-18 15:53:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:12,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 15:53:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 15:53:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:53:12,843 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2024-09-18 15:53:14,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:14,379 INFO L93 Difference]: Finished difference Result 139 states and 189 transitions. [2024-09-18 15:53:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:53:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 39 [2024-09-18 15:53:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:14,383 INFO L225 Difference]: With dead ends: 139 [2024-09-18 15:53:14,383 INFO L226 Difference]: Without dead ends: 137 [2024-09-18 15:53:14,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:53:14,384 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:14,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 218 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-18 15:53:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-18 15:53:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-09-18 15:53:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 56 states have call successors, (56), 14 states have call predecessors, (56), 13 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 15:53:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2024-09-18 15:53:14,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 39 [2024-09-18 15:53:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:14,411 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2024-09-18 15:53:14,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2024-09-18 15:53:14,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2024-09-18 15:53:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 15:53:14,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:14,414 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:14,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:53:14,614 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 [2024-09-18 15:53:14,615 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:14,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1819175000, now seen corresponding path program 1 times [2024-09-18 15:53:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:14,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126060204] [2024-09-18 15:53:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:14,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648599482] [2024-09-18 15:53:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:14,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:14,666 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) [2024-09-18 15:53:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:53:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:14,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:53:14,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:53:14,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:23,106 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-18 15:53:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:53:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126060204] [2024-09-18 15:53:51,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648599482] [2024-09-18 15:53:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648599482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:51,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-09-18 15:53:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478941001] [2024-09-18 15:53:51,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:51,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:53:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:53:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:53:51,965 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 15:53:54,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:58,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:02,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:06,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:07,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:11,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:15,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:54:19,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:23,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:54:27,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:32,838 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 [] [2024-09-18 15:54:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:32,866 INFO L93 Difference]: Finished difference Result 155 states and 214 transitions. [2024-09-18 15:54:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:54:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 54 [2024-09-18 15:54:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:32,868 INFO L225 Difference]: With dead ends: 155 [2024-09-18 15:54:32,868 INFO L226 Difference]: Without dead ends: 137 [2024-09-18 15:54:32,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:54:32,869 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:32,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 148 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 9 Unknown, 0 Unchecked, 40.9s Time] [2024-09-18 15:54:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-18 15:54:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-09-18 15:54:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-18 15:54:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2024-09-18 15:54:32,903 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 54 [2024-09-18 15:54:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:32,903 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2024-09-18 15:54:32,903 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 15:54:32,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2024-09-18 15:54:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:54:32,905 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:32,905 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:32,926 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:54:33,106 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 [2024-09-18 15:54:33,107 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:33,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2033276272, now seen corresponding path program 1 times [2024-09-18 15:54:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415875606] [2024-09-18 15:54:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:54:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:54:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:54:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:54:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:54:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:54:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:54:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:54:34,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:34,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415875606] [2024-09-18 15:54:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415875606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732427027] [2024-09-18 15:54:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:34,188 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) [2024-09-18 15:54:34,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:54:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:34,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 15:54:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:54:34,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:53,626 WARN L293 SmtUtils]: Spent 8.40s 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) [2024-09-18 15:55:10,684 WARN L293 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 15:55:26,953 WARN L293 SmtUtils]: Spent 8.04s 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) [2024-09-18 15:55:35,331 WARN L293 SmtUtils]: Spent 8.18s 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) [2024-09-18 15:55:47,596 WARN L293 SmtUtils]: Spent 12.26s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 15:56:12,740 WARN L293 SmtUtils]: Spent 12.36s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:56:32,818 WARN L293 SmtUtils]: Spent 20.07s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 15:56:40,912 WARN L293 SmtUtils]: Spent 8.09s 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)