./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --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-f1d7dc9-m [2024-09-20 12:33:09,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:33:10,059 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:33:10,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:33:10,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:33:10,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:33:10,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:33:10,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:33:10,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:33:10,099 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:33:10,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:33:10,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:33:10,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:33:10,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:33:10,101 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:33:10,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:33:10,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:33:10,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:33:10,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:33:10,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:33:10,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:33:10,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:33:10,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:33:10,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:33:10,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:33:10,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:33:10,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:33:10,108 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:33:10,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:33:10,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:33:10,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:33:10,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:33:10,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:33:10,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:33:10,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:33:10,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:33:10,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:33:10,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:33:10,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:33:10,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:33:10,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:33:10,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:33:10,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:33:10,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:33:10,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:33:10,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:33:10,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:33:10,358 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:33:10,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-09-20 12:33:11,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:33:12,002 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:33:12,002 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-09-20 12:33:12,013 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b6b5f0fa6/2684ff77c71747a8a68cb6038f556503/FLAG742b5056f [2024-09-20 12:33:12,029 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b6b5f0fa6/2684ff77c71747a8a68cb6038f556503 [2024-09-20 12:33:12,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:33:12,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:33:12,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:33:12,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:33:12,039 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:33:12,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a34c004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12, skipping insertion in model container [2024-09-20 12:33:12,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:33:12,202 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-09-20 12:33:12,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:33:12,230 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:33:12,240 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-09-20 12:33:12,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:33:12,268 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:33:12,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12 WrapperNode [2024-09-20 12:33:12,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:33:12,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:33:12,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:33:12,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:33:12,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,297 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:33:12,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:33:12,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:33:12,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:33:12,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:33:12,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,326 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]. [2024-09-20 12:33:12,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:33:12,342 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:33:12,343 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:33:12,343 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:33:12,344 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (1/1) ... [2024-09-20 12:33:12,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:33:12,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:12,368 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) [2024-09-20 12:33:12,371 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 [2024-09-20 12:33:12,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:33:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:33:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:33:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:33:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:33:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:33:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:33:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:33:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:33:12,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:33:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:33:12,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:33:12,463 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:33:12,465 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:33:12,628 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:33:12,629 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:33:12,651 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:33:12,651 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 12:33:12,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:33:12 BoogieIcfgContainer [2024-09-20 12:33:12,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:33:12,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:33:12,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:33:12,659 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:33:12,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:33:12" (1/3) ... [2024-09-20 12:33:12,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f032ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:33:12, skipping insertion in model container [2024-09-20 12:33:12,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:12" (2/3) ... [2024-09-20 12:33:12,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f032ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:33:12, skipping insertion in model container [2024-09-20 12:33:12,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:33:12" (3/3) ... [2024-09-20 12:33:12,664 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2024-09-20 12:33:12,682 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:33:12,683 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:33:12,751 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:33:12,757 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;@7cac69b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:33:12,758 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:33:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 12:33:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:33:12,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:12,773 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:12,773 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:12,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-20 12:33:12,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:12,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941632392] [2024-09-20 12:33:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:12,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:12,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941632392] [2024-09-20 12:33:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941632392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:12,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:12,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:33:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116312933] [2024-09-20 12:33:12,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:12,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:33:12,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:33:12,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:33:13,000 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:13,024 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-20 12:33:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:33:13,026 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 12:33:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:13,032 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:33:13,032 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 12:33:13,034 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:33:13,037 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:13,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 12:33:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 12:33:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:33:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-20 12:33:13,066 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-20 12:33:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:13,067 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-20 12:33:13,067 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:13,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-20 12:33:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:33:13,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:13,070 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:13,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:33:13,070 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:13,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-20 12:33:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:13,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997571760] [2024-09-20 12:33:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997571760] [2024-09-20 12:33:13,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997571760] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:13,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:13,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 12:33:13,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242249502] [2024-09-20 12:33:13,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:13,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:33:13,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:13,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:33:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:13,378 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:13,480 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-20 12:33:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:33:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-20 12:33:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:13,483 INFO L225 Difference]: With dead ends: 53 [2024-09-20 12:33:13,483 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 12:33:13,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:13,485 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:13,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 12:33:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-20 12:33:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:33:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-20 12:33:13,505 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-20 12:33:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:13,505 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-20 12:33:13,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:13,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-20 12:33:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:33:13,508 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:13,508 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:13,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:33:13,508 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:13,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-20 12:33:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454637015] [2024-09-20 12:33:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124021988] [2024-09-20 12:33:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:13,534 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) [2024-09-20 12:33:13,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:33:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:13,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:13,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:13,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:13,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454637015] [2024-09-20 12:33:13,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124021988] [2024-09-20 12:33:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124021988] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:13,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:13,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:13,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353925907] [2024-09-20 12:33:13,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:13,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:13,718 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:13,786 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-20 12:33:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-20 12:33:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:13,788 INFO L225 Difference]: With dead ends: 52 [2024-09-20 12:33:13,788 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:33:13,789 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:13,790 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:13,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:33:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-20 12:33:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:33:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-20 12:33:13,803 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-20 12:33:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:13,804 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-20 12:33:13,804 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:13,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-20 12:33:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:33:13,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:13,806 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:13,824 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:33:14,010 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 [2024-09-20 12:33:14,011 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:14,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-20 12:33:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:14,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877274174] [2024-09-20 12:33:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:14,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:14,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877274174] [2024-09-20 12:33:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877274174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333599238] [2024-09-20 12:33:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:14,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:14,261 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) [2024-09-20 12:33:14,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:33:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:14,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:14,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:14,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333599238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:14,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:33:14,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 12:33:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982632888] [2024-09-20 12:33:14,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:14,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:33:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:33:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:33:14,483 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:14,680 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-20 12:33:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:33:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-20 12:33:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:14,682 INFO L225 Difference]: With dead ends: 102 [2024-09-20 12:33:14,682 INFO L226 Difference]: Without dead ends: 95 [2024-09-20 12:33:14,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:33:14,683 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:14,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-20 12:33:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-20 12:33:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 12:33:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-20 12:33:14,707 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-20 12:33:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:14,707 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-20 12:33:14,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:14,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-20 12:33:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:33:14,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:14,709 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:14,726 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:33:14,913 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 [2024-09-20 12:33:14,914 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:14,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-20 12:33:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593997153] [2024-09-20 12:33:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:14,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526101172] [2024-09-20 12:33:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:14,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:14,948 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) [2024-09-20 12:33:14,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:33:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:15,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:15,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:15,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593997153] [2024-09-20 12:33:15,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526101172] [2024-09-20 12:33:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526101172] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230602009] [2024-09-20 12:33:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:15,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:15,101 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:15,171 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-20 12:33:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-20 12:33:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:15,174 INFO L225 Difference]: With dead ends: 78 [2024-09-20 12:33:15,176 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 12:33:15,176 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:15,177 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:15,177 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 12:33:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-20 12:33:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 12:33:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-20 12:33:15,207 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-20 12:33:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:15,207 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-20 12:33:15,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:15,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-20 12:33:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:33:15,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:15,209 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:15,228 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:15,409 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 [2024-09-20 12:33:15,410 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:15,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-20 12:33:15,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:15,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525083805] [2024-09-20 12:33:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:15,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:15,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634859301] [2024-09-20 12:33:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:15,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:15,427 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) [2024-09-20 12:33:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:33:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:15,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 12:33:15,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:15,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525083805] [2024-09-20 12:33:16,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634859301] [2024-09-20 12:33:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634859301] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:16,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:16,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-20 12:33:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627285825] [2024-09-20 12:33:16,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:16,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 12:33:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 12:33:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:33:16,144 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:17,430 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-20 12:33:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:33:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-20 12:33:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:17,433 INFO L225 Difference]: With dead ends: 132 [2024-09-20 12:33:17,433 INFO L226 Difference]: Without dead ends: 130 [2024-09-20 12:33:17,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:33:17,434 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:17,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:33:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-20 12:33:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-20 12:33:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:33:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-20 12:33:17,477 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-20 12:33:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:17,477 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-20 12:33:17,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:17,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-20 12:33:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:33:17,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:17,479 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:17,496 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:33:17,680 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 [2024-09-20 12:33:17,680 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:17,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-20 12:33:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211645554] [2024-09-20 12:33:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354814230] [2024-09-20 12:33:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:17,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:17,694 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) [2024-09-20 12:33:17,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:33:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:17,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:33:17,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 12:33:17,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:17,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211645554] [2024-09-20 12:33:17,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354814230] [2024-09-20 12:33:17,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354814230] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:17,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:17,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737354941] [2024-09-20 12:33:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:17,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:17,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:17,787 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:17,878 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-20 12:33:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-20 12:33:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:17,881 INFO L225 Difference]: With dead ends: 155 [2024-09-20 12:33:17,881 INFO L226 Difference]: Without dead ends: 153 [2024-09-20 12:33:17,882 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:17,882 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:17,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-20 12:33:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-20 12:33:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 12:33:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-20 12:33:17,927 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-20 12:33:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:17,928 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-20 12:33:17,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:17,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-20 12:33:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:33:17,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:17,932 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:17,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:33:18,132 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 [2024-09-20 12:33:18,133 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:18,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-20 12:33:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:18,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035614256] [2024-09-20 12:33:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415888053] [2024-09-20 12:33:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:18,148 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) [2024-09-20 12:33:18,150 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:33:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:18,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:33:18,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:18,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:18,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035614256] [2024-09-20 12:33:18,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415888053] [2024-09-20 12:33:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415888053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:18,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:33:18,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-20 12:33:18,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258633639] [2024-09-20 12:33:18,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:18,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:33:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:33:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:33:18,391 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:18,582 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-20 12:33:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:33:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-20 12:33:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:18,584 INFO L225 Difference]: With dead ends: 174 [2024-09-20 12:33:18,585 INFO L226 Difference]: Without dead ends: 172 [2024-09-20 12:33:18,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:33:18,585 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:18,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-20 12:33:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-20 12:33:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-20 12:33:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-20 12:33:18,634 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-20 12:33:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:18,634 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-20 12:33:18,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:18,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-20 12:33:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:33:18,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:18,636 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:18,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:33:18,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:18,840 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:18,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-20 12:33:18,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:18,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618062278] [2024-09-20 12:33:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:18,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:18,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807527484] [2024-09-20 12:33:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:18,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:18,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:33:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:18,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:33:18,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 12:33:18,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618062278] [2024-09-20 12:33:18,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807527484] [2024-09-20 12:33:18,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807527484] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:18,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:18,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030606701] [2024-09-20 12:33:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:18,952 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:18,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:18,953 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:33:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:19,116 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-20 12:33:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:19,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-20 12:33:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:19,119 INFO L225 Difference]: With dead ends: 254 [2024-09-20 12:33:19,119 INFO L226 Difference]: Without dead ends: 252 [2024-09-20 12:33:19,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:19,121 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:19,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-20 12:33:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-20 12:33:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 12:33:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-20 12:33:19,200 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-20 12:33:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:19,200 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-20 12:33:19,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:33:19,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-20 12:33:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:33:19,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:19,203 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:19,220 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:33:19,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:19,404 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:19,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-20 12:33:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:19,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832383465] [2024-09-20 12:33:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:33:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832383465] [2024-09-20 12:33:19,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832383465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:19,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:19,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684779993] [2024-09-20 12:33:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:19,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:19,486 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:19,627 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-20 12:33:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:33:19,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-20 12:33:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:19,631 INFO L225 Difference]: With dead ends: 291 [2024-09-20 12:33:19,631 INFO L226 Difference]: Without dead ends: 177 [2024-09-20 12:33:19,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:33:19,634 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:19,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-20 12:33:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-20 12:33:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-20 12:33:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-20 12:33:19,680 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-20 12:33:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:19,680 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-20 12:33:19,681 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:19,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-20 12:33:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:33:19,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:19,682 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:19,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 12:33:19,682 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:19,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-20 12:33:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797460665] [2024-09-20 12:33:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231200100] [2024-09-20 12:33:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:19,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:19,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:19,706 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:33:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:19,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:33:19,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 12:33:20,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 12:33:21,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797460665] [2024-09-20 12:33:21,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231200100] [2024-09-20 12:33:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231200100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:21,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:21,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:33:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145325419] [2024-09-20 12:33:21,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:21,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:33:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:33:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:33:21,591 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 12:33:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:25,633 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-20 12:33:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 12:33:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-20 12:33:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:25,638 INFO L225 Difference]: With dead ends: 393 [2024-09-20 12:33:25,638 INFO L226 Difference]: Without dead ends: 385 [2024-09-20 12:33:25,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:33:25,640 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:25,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 12:33:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-20 12:33:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-20 12:33:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-20 12:33:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-20 12:33:25,774 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-20 12:33:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:25,774 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-20 12:33:25,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 12:33:25,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-20 12:33:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:25,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:25,777 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:25,795 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 12:33:25,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:25,983 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:25,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-20 12:33:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731655358] [2024-09-20 12:33:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:33:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:33:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:33:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:33:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:33:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:33:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 12:33:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731655358] [2024-09-20 12:33:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731655358] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:26,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:26,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016239235] [2024-09-20 12:33:26,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:26,089 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:26,090 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:33:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:26,269 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-20 12:33:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-20 12:33:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:26,272 INFO L225 Difference]: With dead ends: 399 [2024-09-20 12:33:26,272 INFO L226 Difference]: Without dead ends: 243 [2024-09-20 12:33:26,273 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 [2024-09-20 12:33:26,274 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:26,274 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-20 12:33:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-20 12:33:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 12:33:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-20 12:33:26,418 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-20 12:33:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:26,418 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-20 12:33:26,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:33:26,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-20 12:33:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 12:33:26,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:26,420 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:26,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-20 12:33:26,420 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:26,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-20 12:33:26,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:26,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39856097] [2024-09-20 12:33:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237454306] [2024-09-20 12:33:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:26,441 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:33:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:26,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:33:26,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-20 12:33:26,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-20 12:33:26,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39856097] [2024-09-20 12:33:26,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237454306] [2024-09-20 12:33:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237454306] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:26,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:33:26,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 12:33:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932687757] [2024-09-20 12:33:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:26,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:33:26,644 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 12:33:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:26,788 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-20 12:33:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-20 12:33:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:26,791 INFO L225 Difference]: With dead ends: 234 [2024-09-20 12:33:26,791 INFO L226 Difference]: Without dead ends: 232 [2024-09-20 12:33:26,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:33:26,792 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:26,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-20 12:33:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-20 12:33:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 12:33:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-20 12:33:26,931 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-20 12:33:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:26,932 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-20 12:33:26,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 12:33:26,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-20 12:33:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:26,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:26,933 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:26,949 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:27,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:33:27,134 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:27,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-20 12:33:27,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:27,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463770492] [2024-09-20 12:33:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:27,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:27,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554567087] [2024-09-20 12:33:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:27,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:27,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:27,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:33:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:27,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 12:33:27,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 12:33:27,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 12:33:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463770492] [2024-09-20 12:33:28,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:28,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554567087] [2024-09-20 12:33:28,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554567087] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:28,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:28,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:33:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928120473] [2024-09-20 12:33:28,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:28,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:33:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:33:28,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:33:28,788 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:33:34,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:33:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:38,463 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-20 12:33:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:33:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-20 12:33:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:38,467 INFO L225 Difference]: With dead ends: 350 [2024-09-20 12:33:38,467 INFO L226 Difference]: Without dead ends: 348 [2024-09-20 12:33:38,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:33:38,468 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:38,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 444 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2024-09-20 12:33:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-20 12:33:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-20 12:33:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-09-20 12:33:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-20 12:33:38,642 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-20 12:33:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:38,642 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-20 12:33:38,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:33:38,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-20 12:33:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:38,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:38,644 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:38,663 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 12:33:38,844 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:33:38,845 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:38,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-20 12:33:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:38,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343357701] [2024-09-20 12:33:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283437928] [2024-09-20 12:33:38,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:33:38,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:38,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:38,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:38,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:33:38,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:33:38,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:33:38,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:33:38,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 12:33:39,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-20 12:33:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343357701] [2024-09-20 12:33:39,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283437928] [2024-09-20 12:33:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283437928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:39,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:39,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-20 12:33:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382333312] [2024-09-20 12:33:39,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:39,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:33:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:33:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:33:39,194 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:33:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:40,064 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-20 12:33:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:33:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-20 12:33:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:40,068 INFO L225 Difference]: With dead ends: 426 [2024-09-20 12:33:40,068 INFO L226 Difference]: Without dead ends: 424 [2024-09-20 12:33:40,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:33:40,070 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:40,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:33:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-20 12:33:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-20 12:33:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-09-20 12:33:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-20 12:33:40,309 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-20 12:33:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:40,309 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-20 12:33:40,310 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:33:40,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-20 12:33:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 12:33:40,311 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:40,311 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:40,320 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:40,512 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:33:40,512 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:40,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-20 12:33:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:40,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592075032] [2024-09-20 12:33:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:40,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110584719] [2024-09-20 12:33:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:40,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:40,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:33:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:40,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 12:33:40,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-20 12:33:41,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 12:33:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592075032] [2024-09-20 12:33:44,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110584719] [2024-09-20 12:33:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110584719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:44,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-20 12:33:44,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200055527] [2024-09-20 12:33:44,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:44,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:33:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:33:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:33:44,009 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 12:33:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:49,963 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-20 12:33:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:33:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-20 12:33:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:49,967 INFO L225 Difference]: With dead ends: 544 [2024-09-20 12:33:49,967 INFO L226 Difference]: Without dead ends: 540 [2024-09-20 12:33:49,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:33:49,969 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:49,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 708 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 12:33:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-20 12:33:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-20 12:33:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-20 12:33:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-20 12:33:50,320 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-20 12:33:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:50,321 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-20 12:33:50,321 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 12:33:50,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-20 12:33:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 12:33:50,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:50,323 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:50,340 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:50,527 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:33:50,528 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:50,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-20 12:33:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:50,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005362178] [2024-09-20 12:33:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672494388] [2024-09-20 12:33:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:50,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:50,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:50,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:33:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:33:50,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-20 12:33:50,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-20 12:33:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005362178] [2024-09-20 12:33:51,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672494388] [2024-09-20 12:33:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672494388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:51,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:51,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 12:33:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744771713] [2024-09-20 12:33:51,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:51,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:33:51,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:33:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:33:51,386 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:33:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:53,263 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-20 12:33:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:33:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-20 12:33:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:53,271 INFO L225 Difference]: With dead ends: 1227 [2024-09-20 12:33:53,271 INFO L226 Difference]: Without dead ends: 1225 [2024-09-20 12:33:53,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 12:33:53,273 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 149 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:53,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 411 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:33:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-20 12:33:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-20 12:33:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:33:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-20 12:33:54,224 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-20 12:33:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:54,224 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-20 12:33:54,224 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:33:54,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-20 12:33:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-20 12:33:54,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:54,231 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:54,248 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:33:54,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:33:54,431 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:54,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-20 12:33:54,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:54,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908375075] [2024-09-20 12:33:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:54,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149893306] [2024-09-20 12:33:54,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:33:54,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:54,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:54,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:33:54,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:33:54,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:33:54,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:33:54,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 12:33:54,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 12:33:55,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:55,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908375075] [2024-09-20 12:33:55,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149893306] [2024-09-20 12:33:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149893306] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:55,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:55,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-20 12:33:55,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62572203] [2024-09-20 12:33:55,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:55,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 12:33:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 12:33:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:33:55,293 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 12:33:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:57,752 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-20 12:33:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:33:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-20 12:33:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:57,761 INFO L225 Difference]: With dead ends: 1373 [2024-09-20 12:33:57,761 INFO L226 Difference]: Without dead ends: 1369 [2024-09-20 12:33:57,762 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:33:57,763 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:57,763 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 393 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:33:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-20 12:33:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-20 12:33:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:33:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-20 12:33:59,045 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-20 12:33:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:59,046 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-20 12:33:59,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 12:33:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-20 12:33:59,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 12:33:59,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:59,048 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:59,056 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:59,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:33:59,249 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:59,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-20 12:33:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160172571] [2024-09-20 12:33:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:33:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:33:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:33:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:33:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 12:33:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 12:33:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 12:33:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 12:33:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:33:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160172571] [2024-09-20 12:33:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160172571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516377739] [2024-09-20 12:33:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:33:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:59,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:59,463 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:33:59,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:33:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:33:59,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:33:59,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:33:59,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:33:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516377739] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:59,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:33:59,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-20 12:33:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294939812] [2024-09-20 12:33:59,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:59,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:33:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:33:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:33:59,687 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:34:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:01,300 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-20 12:34:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:34:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-20 12:34:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:01,308 INFO L225 Difference]: With dead ends: 1291 [2024-09-20 12:34:01,308 INFO L226 Difference]: Without dead ends: 1286 [2024-09-20 12:34:01,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:34:01,309 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:01,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:34:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-20 12:34:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-20 12:34:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:34:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-20 12:34:02,497 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-20 12:34:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:02,498 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-20 12:34:02,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:34:02,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-20 12:34:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-20 12:34:02,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:02,500 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:02,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 12:34:02,704 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:02,705 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:02,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-20 12:34:02,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:02,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437315790] [2024-09-20 12:34:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:02,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608649247] [2024-09-20 12:34:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:34:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:02,729 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:02,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:34:02,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:34:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:02,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-20 12:34:02,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-09-20 12:34:03,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 12:34:07,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:07,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437315790] [2024-09-20 12:34:07,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:07,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608649247] [2024-09-20 12:34:07,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608649247] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:07,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:07,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2024-09-20 12:34:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103691153] [2024-09-20 12:34:07,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:07,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 12:34:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 12:34:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-09-20 12:34:07,017 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 29 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-09-20 12:34:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:20,517 INFO L93 Difference]: Finished difference Result 1600 states and 2597 transitions. [2024-09-20 12:34:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-20 12:34:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2024-09-20 12:34:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:20,527 INFO L225 Difference]: With dead ends: 1600 [2024-09-20 12:34:20,528 INFO L226 Difference]: Without dead ends: 1594 [2024-09-20 12:34:20,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1713, Invalid=6659, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 12:34:20,531 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 315 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:20,531 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1050 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-20 12:34:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2024-09-20 12:34:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1405. [2024-09-20 12:34:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 687 states have (on average 1.3231441048034935) internal successors, (909), 687 states have internal predecessors, (909), 687 states have call successors, (687), 32 states have call predecessors, (687), 30 states have return successors, (685), 685 states have call predecessors, (685), 685 states have call successors, (685) [2024-09-20 12:34:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2281 transitions. [2024-09-20 12:34:22,207 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2281 transitions. Word has length 112 [2024-09-20 12:34:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:22,208 INFO L474 AbstractCegarLoop]: Abstraction has 1405 states and 2281 transitions. [2024-09-20 12:34:22,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-09-20 12:34:22,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2281 transitions. [2024-09-20 12:34:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 12:34:22,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:22,210 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 12:34:22,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:22,410 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:22,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-20 12:34:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022293360] [2024-09-20 12:34:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:22,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803759003] [2024-09-20 12:34:22,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:34:22,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:22,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:22,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:22,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:34:22,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:34:22,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:22,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-20 12:34:22,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 12:34:23,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 12:34:26,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:26,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022293360] [2024-09-20 12:34:26,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:26,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803759003] [2024-09-20 12:34:26,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803759003] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:26,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:26,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-20 12:34:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501998220] [2024-09-20 12:34:26,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:26,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 12:34:26,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 12:34:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:34:26,049 INFO L87 Difference]: Start difference. First operand 1405 states and 2281 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 12:34:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:44,097 INFO L93 Difference]: Finished difference Result 1718 states and 2761 transitions. [2024-09-20 12:34:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-09-20 12:34:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-20 12:34:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:44,106 INFO L225 Difference]: With dead ends: 1718 [2024-09-20 12:34:44,107 INFO L226 Difference]: Without dead ends: 1712 [2024-09-20 12:34:44,110 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-09-20 12:34:44,110 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 339 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:44,111 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 928 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-20 12:34:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2024-09-20 12:34:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1560. [2024-09-20 12:34:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 766 states have (on average 1.3198433420365536) internal successors, (1011), 766 states have internal predecessors, (1011), 759 states have call successors, (759), 36 states have call predecessors, (759), 34 states have return successors, (757), 757 states have call predecessors, (757), 757 states have call successors, (757) [2024-09-20 12:34:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2527 transitions. [2024-09-20 12:34:46,395 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2527 transitions. Word has length 115 [2024-09-20 12:34:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:46,395 INFO L474 AbstractCegarLoop]: Abstraction has 1560 states and 2527 transitions. [2024-09-20 12:34:46,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 12:34:46,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2527 transitions. [2024-09-20 12:34:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 12:34:46,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:46,398 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:46,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 12:34:46,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:46,598 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:46,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-20 12:34:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599825528] [2024-09-20 12:34:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218655323] [2024-09-20 12:34:46,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:34:46,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:46,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:46,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:34:46,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:34:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:46,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-20 12:34:46,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 12:34:48,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599825528] [2024-09-20 12:34:53,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218655323] [2024-09-20 12:34:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218655323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:34:53,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:34:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 12:34:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565850913] [2024-09-20 12:34:53,676 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:53,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:34:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:34:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:34:53,677 INFO L87 Difference]: Start difference. First operand 1560 states and 2527 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:34:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:57,838 INFO L93 Difference]: Finished difference Result 1699 states and 2735 transitions. [2024-09-20 12:34:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:34:57,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-20 12:34:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:57,847 INFO L225 Difference]: With dead ends: 1699 [2024-09-20 12:34:57,847 INFO L226 Difference]: Without dead ends: 1694 [2024-09-20 12:34:57,849 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 12:34:57,849 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 85 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:57,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 817 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:34:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2024-09-20 12:35:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1674. [2024-09-20 12:35:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 820 states have (on average 1.3195121951219513) internal successors, (1082), 820 states have internal predecessors, (1082), 815 states have call successors, (815), 40 states have call predecessors, (815), 38 states have return successors, (813), 813 states have call predecessors, (813), 813 states have call successors, (813) [2024-09-20 12:35:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2710 transitions. [2024-09-20 12:35:00,242 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2710 transitions. Word has length 115 [2024-09-20 12:35:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:35:00,242 INFO L474 AbstractCegarLoop]: Abstraction has 1674 states and 2710 transitions. [2024-09-20 12:35:00,242 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:35:00,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2710 transitions. [2024-09-20 12:35:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 12:35:00,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:35:00,244 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:35:00,257 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 12:35:00,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 12:35:00,444 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:35:00,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-20 12:35:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:35:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756294584] [2024-09-20 12:35:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:35:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:35:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:35:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436994825] [2024-09-20 12:35:00,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:35:00,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:35:00,476 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:35:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:35:00,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 12:35:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:35:00,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-20 12:35:00,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:35:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-09-20 12:35:01,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:35:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-20 12:35:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:35:04,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756294584] [2024-09-20 12:35:04,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:35:04,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436994825] [2024-09-20 12:35:04,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436994825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:35:04,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:35:04,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-09-20 12:35:04,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029996513] [2024-09-20 12:35:04,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:35:04,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 12:35:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:35:04,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 12:35:04,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:35:04,093 INFO L87 Difference]: Start difference. First operand 1674 states and 2710 transitions. Second operand has 33 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:35:13,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:35:44,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:35:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:35:59,843 INFO L93 Difference]: Finished difference Result 2484 states and 4022 transitions. [2024-09-20 12:35:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-09-20 12:35:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-09-20 12:35:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:35:59,857 INFO L225 Difference]: With dead ends: 2484 [2024-09-20 12:35:59,857 INFO L226 Difference]: Without dead ends: 2478 [2024-09-20 12:35:59,860 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=2412, Invalid=13338, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 12:35:59,861 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 324 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:35:59,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1433 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2024-09-20 12:35:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2024-09-20 12:36:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1771. [2024-09-20 12:36:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 864 states have (on average 1.3171296296296295) internal successors, (1138), 864 states have internal predecessors, (1138), 863 states have call successors, (863), 45 states have call predecessors, (863), 43 states have return successors, (861), 861 states have call predecessors, (861), 861 states have call successors, (861) [2024-09-20 12:36:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2862 transitions. [2024-09-20 12:36:03,150 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2862 transitions. Word has length 120 [2024-09-20 12:36:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:36:03,151 INFO L474 AbstractCegarLoop]: Abstraction has 1771 states and 2862 transitions. [2024-09-20 12:36:03,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:36:03,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2862 transitions. [2024-09-20 12:36:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-20 12:36:03,154 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:36:03,154 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:36:03,161 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 12:36:03,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:36:03,355 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:36:03,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-20 12:36:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:36:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114891920] [2024-09-20 12:36:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:36:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:36:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:36:03,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900832057] [2024-09-20 12:36:03,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:36:03,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:36:03,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:36:03,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:36:03,374 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:36:03,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 12:36:03,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:36:03,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-20 12:36:03,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:36:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 12:36:04,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:36:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 12:36:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:36:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114891920] [2024-09-20 12:36:08,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:36:08,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900832057] [2024-09-20 12:36:08,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900832057] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:36:08,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:36:08,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2024-09-20 12:36:08,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265417473] [2024-09-20 12:36:08,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:36:08,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 12:36:08,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:36:08,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 12:36:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:36:08,896 INFO L87 Difference]: Start difference. First operand 1771 states and 2862 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:36:13,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:36:28,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:36:32,513 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 [] [2024-09-20 12:36:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:36:41,686 INFO L93 Difference]: Finished difference Result 2892 states and 4748 transitions. [2024-09-20 12:36:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-20 12:36:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 132 [2024-09-20 12:36:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:36:41,698 INFO L225 Difference]: With dead ends: 2892 [2024-09-20 12:36:41,698 INFO L226 Difference]: Without dead ends: 2886 [2024-09-20 12:36:41,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3656 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1665, Invalid=10767, Unknown=0, NotChecked=0, Total=12432 [2024-09-20 12:36:41,701 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 292 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:36:41,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1230 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1541 Invalid, 2 Unknown, 0 Unchecked, 18.9s Time] [2024-09-20 12:36:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2024-09-20 12:36:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2076. [2024-09-20 12:36:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1018 states have (on average 1.3172888015717092) internal successors, (1341), 1018 states have internal predecessors, (1341), 1011 states have call successors, (1011), 48 states have call predecessors, (1011), 46 states have return successors, (1009), 1009 states have call predecessors, (1009), 1009 states have call successors, (1009) [2024-09-20 12:36:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3361 transitions. [2024-09-20 12:36:45,612 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3361 transitions. Word has length 132 [2024-09-20 12:36:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:36:45,612 INFO L474 AbstractCegarLoop]: Abstraction has 2076 states and 3361 transitions. [2024-09-20 12:36:45,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:36:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3361 transitions. [2024-09-20 12:36:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-20 12:36:45,616 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:36:45,616 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:36:45,633 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 12:36:45,820 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:36:45,820 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:36:45,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 972510395, now seen corresponding path program 7 times [2024-09-20 12:36:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:36:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444201012] [2024-09-20 12:36:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:36:45,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:36:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:36:45,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385386109] [2024-09-20 12:36:45,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:36:45,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:36:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:36:45,850 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:36:45,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:36:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:45,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-20 12:36:45,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:36:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-20 12:36:47,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:36:53,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:36:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444201012] [2024-09-20 12:36:53,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:36:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385386109] [2024-09-20 12:36:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385386109] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:36:53,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:36:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 12:36:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4366673] [2024-09-20 12:36:53,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:36:53,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:36:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:36:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:36:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:36:53,257 INFO L87 Difference]: Start difference. First operand 2076 states and 3361 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-20 12:36:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:36:58,913 INFO L93 Difference]: Finished difference Result 2239 states and 3615 transitions. [2024-09-20 12:36:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:36:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2024-09-20 12:36:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:36:58,927 INFO L225 Difference]: With dead ends: 2239 [2024-09-20 12:36:58,927 INFO L226 Difference]: Without dead ends: 2234 [2024-09-20 12:36:58,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:36:58,929 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 96 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:36:58,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 531 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:36:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2024-09-20 12:37:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2111. [2024-09-20 12:37:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 1035 states have (on average 1.3169082125603864) internal successors, (1363), 1035 states have internal predecessors, (1363), 1027 states have call successors, (1027), 50 states have call predecessors, (1027), 48 states have return successors, (1025), 1025 states have call predecessors, (1025), 1025 states have call successors, (1025) [2024-09-20 12:37:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3415 transitions. [2024-09-20 12:37:03,144 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3415 transitions. Word has length 137 [2024-09-20 12:37:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:37:03,145 INFO L474 AbstractCegarLoop]: Abstraction has 2111 states and 3415 transitions. [2024-09-20 12:37:03,145 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-20 12:37:03,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3415 transitions. [2024-09-20 12:37:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-20 12:37:03,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:37:03,149 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:37:03,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 12:37:03,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:37:03,350 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:37:03,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-09-20 12:37:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:37:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620953433] [2024-09-20 12:37:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:37:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:37:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:37:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828263039] [2024-09-20 12:37:03,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:37:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:37:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:37:03,385 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:37:03,386 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:37:03,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:37:03,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:37:03,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 12:37:03,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:37:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-20 12:37:04,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:37:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-20 12:37:08,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:37:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620953433] [2024-09-20 12:37:08,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:37:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828263039] [2024-09-20 12:37:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828263039] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:37:08,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:37:08,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2024-09-20 12:37:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122297512] [2024-09-20 12:37:08,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:37:08,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 12:37:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:37:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 12:37:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:37:08,705 INFO L87 Difference]: Start difference. First operand 2111 states and 3415 transitions. Second operand has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2024-09-20 12:37:28,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []