./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:13:48,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:13:48,896 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:13:48,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:13:48,901 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:13:48,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:13:48,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:13:48,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:13:48,920 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:13:48,920 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:13:48,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:13:48,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:13:48,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:13:48,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:13:48,922 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:13:48,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:13:48,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:13:48,923 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:13:48,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:13:48,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:13:48,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:13:48,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:13:48,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:13:48,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:13:48,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:13:48,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:13:48,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:13:48,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:13:48,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:13:48,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:13:48,926 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:13:48,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:13:48,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:13:48,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:13:48,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:13:48,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:13:48,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:13:48,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:13:48,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:13:48,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:13:48,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:13:48,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:13:48,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:13:49,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:13:49,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:13:49,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:13:49,247 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:13:49,247 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:13:49,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-09-15 19:13:50,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:13:50,803 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:13:50,804 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-09-15 19:13:50,811 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/95b8193ef/2b5f1049f1e94aacacf2002ff04d7eee/FLAGb3d4bfc56 [2024-09-15 19:13:50,823 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/95b8193ef/2b5f1049f1e94aacacf2002ff04d7eee [2024-09-15 19:13:50,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:13:50,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:13:50,828 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:13:50,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:13:50,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:13:50,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:13:50" (1/1) ... [2024-09-15 19:13:50,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2684bf8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:50, skipping insertion in model container [2024-09-15 19:13:50,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:13:50" (1/1) ... [2024-09-15 19:13:50,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:13:50,976 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] [2024-09-15 19:13:50,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:13:51,004 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:13:51,014 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] [2024-09-15 19:13:51,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:13:51,038 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:13:51,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51 WrapperNode [2024-09-15 19:13:51,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:13:51,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:13:51,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:13:51,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:13:51,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,055 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:13:51,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:13:51,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:13:51,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:13:51,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:13:51,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,079 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-15 19:13:51,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,090 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:13:51,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:13:51,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:13:51,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:13:51,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (1/1) ... [2024-09-15 19:13:51,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:13:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:51,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:13:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 19:13:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:13:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:13:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:13:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:13:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:13:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:13:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:13:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:13:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:13:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:13:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:13:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:13:51,202 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:13:51,204 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:13:51,311 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:13:51,312 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:13:51,325 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:13:51,325 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-15 19:13:51,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:13:51 BoogieIcfgContainer [2024-09-15 19:13:51,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:13:51,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:13:51,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:13:51,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:13:51,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:13:50" (1/3) ... [2024-09-15 19:13:51,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65701569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:13:51, skipping insertion in model container [2024-09-15 19:13:51,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:51" (2/3) ... [2024-09-15 19:13:51,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65701569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:13:51, skipping insertion in model container [2024-09-15 19:13:51,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:13:51" (3/3) ... [2024-09-15 19:13:51,334 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2024-09-15 19:13:51,347 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:13:51,347 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:13:51,396 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:13:51,403 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;@1ce7700d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:13:51,403 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:13:51,413 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) [2024-09-15 19:13:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:13:51,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:51,421 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] [2024-09-15 19:13:51,421 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:51,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-15 19:13:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:51,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647894490] [2024-09-15 19:13:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:51,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647894490] [2024-09-15 19:13:51,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647894490] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:51,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:51,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:13:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905550085] [2024-09-15 19:13:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:51,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:13:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:51,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:13:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:13:51,619 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) [2024-09-15 19:13:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:51,647 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-15 19:13:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:13:51,650 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 [2024-09-15 19:13:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:51,655 INFO L225 Difference]: With dead ends: 70 [2024-09-15 19:13:51,655 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:13:51,658 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 [2024-09-15 19:13:51,663 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:51,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:13:51,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-15 19:13:51,700 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) [2024-09-15 19:13:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-15 19:13:51,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-15 19:13:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:51,704 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-15 19:13:51,704 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) [2024-09-15 19:13:51,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-15 19:13:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 19:13:51,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:51,707 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] [2024-09-15 19:13:51,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:13:51,708 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:51,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-15 19:13:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331224673] [2024-09-15 19:13:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:51,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:13:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:52,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331224673] [2024-09-15 19:13:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331224673] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:52,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:52,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:13:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327251151] [2024-09-15 19:13:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:52,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:13:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:13:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:13:52,007 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) [2024-09-15 19:13:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:52,103 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-15 19:13:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:13:52,104 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 [2024-09-15 19:13:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:52,105 INFO L225 Difference]: With dead ends: 53 [2024-09-15 19:13:52,105 INFO L226 Difference]: Without dead ends: 46 [2024-09-15 19:13:52,105 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 [2024-09-15 19:13:52,106 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 [2024-09-15 19:13:52,107 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] [2024-09-15 19:13:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-15 19:13:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-15 19:13:52,125 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) [2024-09-15 19:13:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-15 19:13:52,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-15 19:13:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:52,127 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-15 19:13:52,127 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) [2024-09-15 19:13:52,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-15 19:13:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:13:52,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:52,129 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] [2024-09-15 19:13:52,129 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:13:52,129 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:52,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-15 19:13:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116436719] [2024-09-15 19:13:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091478056] [2024-09-15 19:13:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:52,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:52,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:13:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:13:52,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:52,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116436719] [2024-09-15 19:13:52,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091478056] [2024-09-15 19:13:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091478056] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:52,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462975260] [2024-09-15 19:13:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:52,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:52,317 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) [2024-09-15 19:13:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:52,356 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-15 19:13:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:52,357 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 [2024-09-15 19:13:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:52,358 INFO L225 Difference]: With dead ends: 52 [2024-09-15 19:13:52,358 INFO L226 Difference]: Without dead ends: 50 [2024-09-15 19:13:52,359 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 [2024-09-15 19:13:52,360 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 [2024-09-15 19:13:52,360 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] [2024-09-15 19:13:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-15 19:13:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-15 19:13:52,369 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) [2024-09-15 19:13:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-15 19:13:52,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-15 19:13:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:52,371 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-15 19:13:52,371 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) [2024-09-15 19:13:52,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-15 19:13:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 19:13:52,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:52,384 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] [2024-09-15 19:13:52,397 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:13:52,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:52,590 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:52,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-15 19:13:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535758820] [2024-09-15 19:13:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:13:52,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:52,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535758820] [2024-09-15 19:13:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535758820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121239686] [2024-09-15 19:13:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:52,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:13:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:13:52,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:13:52,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:13:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121239686] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:52,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:13:52,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-15 19:13:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567790867] [2024-09-15 19:13:52,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:52,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:13:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:13:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:13:52,998 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) [2024-09-15 19:13:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:53,174 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-15 19:13:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:13:53,175 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 [2024-09-15 19:13:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:53,176 INFO L225 Difference]: With dead ends: 102 [2024-09-15 19:13:53,178 INFO L226 Difference]: Without dead ends: 95 [2024-09-15 19:13:53,178 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 [2024-09-15 19:13:53,179 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 [2024-09-15 19:13:53,179 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] [2024-09-15 19:13:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-15 19:13:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-15 19:13:53,199 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) [2024-09-15 19:13:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-15 19:13:53,203 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-15 19:13:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:53,204 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-15 19:13:53,204 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) [2024-09-15 19:13:53,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-15 19:13:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 19:13:53,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:53,205 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] [2024-09-15 19:13:53,223 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:53,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,410 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:53,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-15 19:13:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140861019] [2024-09-15 19:13:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:53,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446323689] [2024-09-15 19:13:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:53,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:53,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:13:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:13:53,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:53,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:53,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140861019] [2024-09-15 19:13:53,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446323689] [2024-09-15 19:13:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446323689] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:53,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:53,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143676786] [2024-09-15 19:13:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:53,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:53,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:53,543 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) [2024-09-15 19:13:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:53,604 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-15 19:13:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:53,605 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 [2024-09-15 19:13:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:53,606 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:13:53,606 INFO L226 Difference]: Without dead ends: 76 [2024-09-15 19:13:53,606 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 [2024-09-15 19:13:53,607 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 [2024-09-15 19:13:53,607 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] [2024-09-15 19:13:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-15 19:13:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-15 19:13:53,635 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) [2024-09-15 19:13:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-15 19:13:53,636 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-15 19:13:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:53,637 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-15 19:13:53,641 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) [2024-09-15 19:13:53,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-15 19:13:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 19:13:53,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:53,647 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] [2024-09-15 19:13:53,664 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:13:53,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,848 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:53,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-15 19:13:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401803139] [2024-09-15 19:13:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936894239] [2024-09-15 19:13:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:53,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:13:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 19:13:53,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:13:54,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:54,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:54,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401803139] [2024-09-15 19:13:54,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:54,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936894239] [2024-09-15 19:13:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936894239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:54,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:54,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-15 19:13:54,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347103317] [2024-09-15 19:13:54,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:54,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:13:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:13:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:13:54,405 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) [2024-09-15 19:13:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:55,479 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-15 19:13:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:13:55,491 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 [2024-09-15 19:13:55,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:55,492 INFO L225 Difference]: With dead ends: 132 [2024-09-15 19:13:55,492 INFO L226 Difference]: Without dead ends: 130 [2024-09-15 19:13:55,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:13:55,493 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:55,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:13:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-15 19:13:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-15 19:13:55,522 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) [2024-09-15 19:13:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-15 19:13:55,523 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-15 19:13:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:55,524 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-15 19:13:55,524 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) [2024-09-15 19:13:55,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-15 19:13:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:13:55,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:55,526 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] [2024-09-15 19:13:55,538 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:13:55,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:55,731 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:55,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-15 19:13:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838387] [2024-09-15 19:13:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:55,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037267239] [2024-09-15 19:13:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:55,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:55,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:13:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:55,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:13:55,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:13:55,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838387] [2024-09-15 19:13:55,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037267239] [2024-09-15 19:13:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037267239] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:55,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:55,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475942635] [2024-09-15 19:13:55,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:55,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:55,858 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) [2024-09-15 19:13:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:55,927 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-15 19:13:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:55,928 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 [2024-09-15 19:13:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:55,929 INFO L225 Difference]: With dead ends: 155 [2024-09-15 19:13:55,929 INFO L226 Difference]: Without dead ends: 153 [2024-09-15 19:13:55,930 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 [2024-09-15 19:13:55,930 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 [2024-09-15 19:13:55,930 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] [2024-09-15 19:13:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-15 19:13:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-15 19:13:55,972 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) [2024-09-15 19:13:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-15 19:13:55,974 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-15 19:13:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:55,974 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-15 19:13:55,974 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) [2024-09-15 19:13:55,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-15 19:13:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:13:55,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:55,976 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] [2024-09-15 19:13:55,992 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:13:56,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:13:56,180 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:56,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-15 19:13:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:56,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879158877] [2024-09-15 19:13:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:56,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:56,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364552510] [2024-09-15 19:13:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:56,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:56,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:56,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:13:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:56,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 19:13:56,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:56,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879158877] [2024-09-15 19:13:56,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364552510] [2024-09-15 19:13:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364552510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:56,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:13:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-15 19:13:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980666074] [2024-09-15 19:13:56,374 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:56,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:13:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:13:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:13:56,375 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) [2024-09-15 19:13:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:56,537 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-15 19:13:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:13:56,537 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 [2024-09-15 19:13:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:56,539 INFO L225 Difference]: With dead ends: 174 [2024-09-15 19:13:56,539 INFO L226 Difference]: Without dead ends: 172 [2024-09-15 19:13:56,540 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 [2024-09-15 19:13:56,540 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 [2024-09-15 19:13:56,541 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] [2024-09-15 19:13:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-15 19:13:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-15 19:13:56,578 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) [2024-09-15 19:13:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-15 19:13:56,579 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-15 19:13:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:56,580 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-15 19:13:56,580 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) [2024-09-15 19:13:56,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-15 19:13:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 19:13:56,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:56,581 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] [2024-09-15 19:13:56,594 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:56,785 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 [2024-09-15 19:13:56,786 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:56,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-15 19:13:56,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:56,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2950678] [2024-09-15 19:13:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:56,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102232221] [2024-09-15 19:13:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:56,798 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) [2024-09-15 19:13:56,803 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:13:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:56,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:13:56,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 19:13:56,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2950678] [2024-09-15 19:13:56,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102232221] [2024-09-15 19:13:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102232221] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:56,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:56,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:56,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918296079] [2024-09-15 19:13:56,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:56,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:56,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:56,882 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) [2024-09-15 19:13:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:56,982 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-15 19:13:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:56,982 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 [2024-09-15 19:13:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:56,984 INFO L225 Difference]: With dead ends: 254 [2024-09-15 19:13:56,984 INFO L226 Difference]: Without dead ends: 252 [2024-09-15 19:13:56,984 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 [2024-09-15 19:13:56,985 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 [2024-09-15 19:13:56,985 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] [2024-09-15 19:13:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-15 19:13:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-15 19:13:57,034 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) [2024-09-15 19:13:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-15 19:13:57,036 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-15 19:13:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:57,036 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-15 19:13:57,036 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) [2024-09-15 19:13:57,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-15 19:13:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 19:13:57,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:57,037 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] [2024-09-15 19:13:57,052 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:13:57,238 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 [2024-09-15 19:13:57,238 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:57,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-15 19:13:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:57,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840650710] [2024-09-15 19:13:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 19:13:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:13:57,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:57,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840650710] [2024-09-15 19:13:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840650710] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:57,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:57,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472656132] [2024-09-15 19:13:57,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:57,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:57,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:57,317 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) [2024-09-15 19:13:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:57,445 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-15 19:13:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:13:57,446 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 [2024-09-15 19:13:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:57,448 INFO L225 Difference]: With dead ends: 291 [2024-09-15 19:13:57,448 INFO L226 Difference]: Without dead ends: 177 [2024-09-15 19:13:57,449 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 [2024-09-15 19:13:57,449 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-15 19:13:57,450 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] [2024-09-15 19:13:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-15 19:13:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-15 19:13:57,481 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) [2024-09-15 19:13:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-15 19:13:57,482 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-15 19:13:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:57,483 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-15 19:13:57,483 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) [2024-09-15 19:13:57,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-15 19:13:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-15 19:13:57,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:57,484 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] [2024-09-15 19:13:57,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-15 19:13:57,484 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:57,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-15 19:13:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759151835] [2024-09-15 19:13:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980605773] [2024-09-15 19:13:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:57,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:57,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:57,500 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) [2024-09-15 19:13:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:13:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:57,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 19:13:57,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-15 19:13:58,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-15 19:13:59,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759151835] [2024-09-15 19:13:59,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980605773] [2024-09-15 19:13:59,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980605773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:59,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:59,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-15 19:13:59,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670047499] [2024-09-15 19:13:59,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:59,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:13:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:13:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:13:59,094 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) [2024-09-15 19:14:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:02,576 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-15 19:14:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-15 19:14:02,576 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 [2024-09-15 19:14:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:02,579 INFO L225 Difference]: With dead ends: 393 [2024-09-15 19:14:02,579 INFO L226 Difference]: Without dead ends: 385 [2024-09-15 19:14:02,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-15 19:14:02,580 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:02,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-15 19:14:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-15 19:14:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-15 19:14:02,668 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) [2024-09-15 19:14:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-15 19:14:02,669 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-15 19:14:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:02,670 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-15 19:14:02,670 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) [2024-09-15 19:14:02,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-15 19:14:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-15 19:14:02,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:02,671 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] [2024-09-15 19:14:02,690 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:14:02,871 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 [2024-09-15 19:14:02,872 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:02,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-15 19:14:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:02,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504756946] [2024-09-15 19:14:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:14:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:14:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:14:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:14:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:14:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:14:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 19:14:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 19:14:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 19:14:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:14:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:14:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 19:14:02,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504756946] [2024-09-15 19:14:02,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504756946] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:14:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:14:02,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:14:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645294830] [2024-09-15 19:14:02,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:14:02,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:14:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:14:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:14:02,969 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) [2024-09-15 19:14:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:03,098 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-15 19:14:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:14:03,098 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 [2024-09-15 19:14:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:03,101 INFO L225 Difference]: With dead ends: 399 [2024-09-15 19:14:03,101 INFO L226 Difference]: Without dead ends: 243 [2024-09-15 19:14:03,101 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 [2024-09-15 19:14:03,102 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 [2024-09-15 19:14:03,102 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] [2024-09-15 19:14:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-15 19:14:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-15 19:14:03,185 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) [2024-09-15 19:14:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-15 19:14:03,187 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-15 19:14:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:03,187 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-15 19:14:03,187 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) [2024-09-15 19:14:03,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-15 19:14:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-15 19:14:03,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:03,190 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] [2024-09-15 19:14:03,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-15 19:14:03,190 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:03,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-15 19:14:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114587611] [2024-09-15 19:14:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:03,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210177256] [2024-09-15 19:14:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:03,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:03,213 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) [2024-09-15 19:14:03,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:14:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:03,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 19:14:03,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-15 19:14:03,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 19:14:03,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114587611] [2024-09-15 19:14:03,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210177256] [2024-09-15 19:14:03,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210177256] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:03,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:14:03,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-15 19:14:03,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960982219] [2024-09-15 19:14:03,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:14:03,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:14:03,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:14:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:14:03,390 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) [2024-09-15 19:14:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:03,519 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-15 19:14:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:14:03,520 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 [2024-09-15 19:14:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:03,522 INFO L225 Difference]: With dead ends: 234 [2024-09-15 19:14:03,522 INFO L226 Difference]: Without dead ends: 232 [2024-09-15 19:14:03,523 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 [2024-09-15 19:14:03,523 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 [2024-09-15 19:14:03,524 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] [2024-09-15 19:14:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-15 19:14:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-15 19:14:03,625 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) [2024-09-15 19:14:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-15 19:14:03,626 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-15 19:14:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:03,626 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-15 19:14:03,627 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) [2024-09-15 19:14:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-15 19:14:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-15 19:14:03,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:03,627 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] [2024-09-15 19:14:03,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 19:14:03,831 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 [2024-09-15 19:14:03,832 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:03,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-15 19:14:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:03,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068057661] [2024-09-15 19:14:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:03,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164434453] [2024-09-15 19:14:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:03,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:03,852 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) [2024-09-15 19:14:03,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:14:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:03,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-15 19:14:03,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-15 19:14:04,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 19:14:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068057661] [2024-09-15 19:14:05,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164434453] [2024-09-15 19:14:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164434453] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:05,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-15 19:14:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676498678] [2024-09-15 19:14:05,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:05,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:14:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:14:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:14:05,426 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) [2024-09-15 19:14:10,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:14:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:14,911 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-15 19:14:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 19:14:14,911 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 [2024-09-15 19:14:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:14,913 INFO L225 Difference]: With dead ends: 350 [2024-09-15 19:14:14,914 INFO L226 Difference]: Without dead ends: 348 [2024-09-15 19:14:14,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 19:14:14,915 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s 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, 6.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:14,915 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 444 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2024-09-15 19:14:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-15 19:14:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-15 19:14:15,071 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) [2024-09-15 19:14:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-15 19:14:15,073 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-15 19:14:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:15,073 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-15 19:14:15,073 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) [2024-09-15 19:14:15,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-15 19:14:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-15 19:14:15,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:15,075 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] [2024-09-15 19:14:15,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:14:15,278 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 [2024-09-15 19:14:15,279 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:15,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-15 19:14:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563759867] [2024-09-15 19:14:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:15,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638906650] [2024-09-15 19:14:15,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:14:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:15,295 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) [2024-09-15 19:14:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:14:15,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:14:15,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:15,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 19:14:15,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-15 19:14:15,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:14:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563759867] [2024-09-15 19:14:15,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638906650] [2024-09-15 19:14:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638906650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:15,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-15 19:14:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68043671] [2024-09-15 19:14:15,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:15,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:14:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:14:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:14:15,648 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) [2024-09-15 19:14:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:16,468 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-15 19:14:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:14:16,469 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 [2024-09-15 19:14:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:16,472 INFO L225 Difference]: With dead ends: 426 [2024-09-15 19:14:16,472 INFO L226 Difference]: Without dead ends: 424 [2024-09-15 19:14:16,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:14:16,475 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-09-15 19:14:16,475 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] [2024-09-15 19:14:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-15 19:14:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-15 19:14:16,672 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) [2024-09-15 19:14:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-15 19:14:16,675 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-15 19:14:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:16,675 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-15 19:14:16,675 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) [2024-09-15 19:14:16,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-15 19:14:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-15 19:14:16,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:16,676 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] [2024-09-15 19:14:16,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:14:16,880 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 [2024-09-15 19:14:16,880 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-15 19:14:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657349926] [2024-09-15 19:14:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034360377] [2024-09-15 19:14:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:16,899 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) [2024-09-15 19:14:16,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:14:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:16,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 19:14:16,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-15 19:14:17,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-15 19:14:20,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657349926] [2024-09-15 19:14:20,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034360377] [2024-09-15 19:14:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034360377] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:20,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-15 19:14:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239850045] [2024-09-15 19:14:20,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:20,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 19:14:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 19:14:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:14:20,376 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) [2024-09-15 19:14:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:26,303 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-15 19:14:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-15 19:14:26,304 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 [2024-09-15 19:14:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:26,307 INFO L225 Difference]: With dead ends: 544 [2024-09-15 19:14:26,307 INFO L226 Difference]: Without dead ends: 540 [2024-09-15 19:14:26,308 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 [2024-09-15 19:14:26,308 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 [2024-09-15 19:14:26,308 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] [2024-09-15 19:14:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-15 19:14:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-15 19:14:26,633 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) [2024-09-15 19:14:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-15 19:14:26,636 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-15 19:14:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:26,636 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-15 19:14:26,636 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) [2024-09-15 19:14:26,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-15 19:14:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-15 19:14:26,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:26,638 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] [2024-09-15 19:14:26,654 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 19:14:26,841 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 [2024-09-15 19:14:26,841 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:26,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-15 19:14:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953859452] [2024-09-15 19:14:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364752103] [2024-09-15 19:14:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:26,871 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) [2024-09-15 19:14:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:14:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:26,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 19:14:26,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-15 19:14:27,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-15 19:14:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953859452] [2024-09-15 19:14:27,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364752103] [2024-09-15 19:14:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364752103] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:27,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-15 19:14:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060824759] [2024-09-15 19:14:27,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:27,590 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:14:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:14:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:14:27,591 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) [2024-09-15 19:14:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:29,509 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-15 19:14:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:14:29,509 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 [2024-09-15 19:14:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:29,517 INFO L225 Difference]: With dead ends: 1227 [2024-09-15 19:14:29,517 INFO L226 Difference]: Without dead ends: 1225 [2024-09-15 19:14:29,518 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 [2024-09-15 19:14:29,519 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 [2024-09-15 19:14:29,519 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] [2024-09-15 19:14:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-15 19:14:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-15 19:14:30,482 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) [2024-09-15 19:14:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-15 19:14:30,488 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-15 19:14:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:30,490 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-15 19:14:30,490 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) [2024-09-15 19:14:30,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-15 19:14:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-15 19:14:30,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:30,492 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] [2024-09-15 19:14:30,505 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 19:14:30,693 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 [2024-09-15 19:14:30,693 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:30,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-15 19:14:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826217996] [2024-09-15 19:14:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:30,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041520832] [2024-09-15 19:14:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:14:30,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:30,716 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) [2024-09-15 19:14:30,722 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 19:14:30,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:14:30,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:30,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 19:14:30,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-15 19:14:31,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-15 19:14:31,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826217996] [2024-09-15 19:14:31,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041520832] [2024-09-15 19:14:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041520832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:31,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-15 19:14:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077675572] [2024-09-15 19:14:31,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:31,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:14:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:14:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:14:31,506 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) [2024-09-15 19:14:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:34,098 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-15 19:14:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 19:14:34,099 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 [2024-09-15 19:14:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:34,107 INFO L225 Difference]: With dead ends: 1373 [2024-09-15 19:14:34,107 INFO L226 Difference]: Without dead ends: 1369 [2024-09-15 19:14:34,108 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 [2024-09-15 19:14:34,109 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2024-09-15 19:14:34,109 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] [2024-09-15 19:14:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-15 19:14:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-15 19:14:35,206 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) [2024-09-15 19:14:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-15 19:14:35,214 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-15 19:14:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:35,214 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-15 19:14:35,215 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) [2024-09-15 19:14:35,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-15 19:14:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-15 19:14:35,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:35,217 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] [2024-09-15 19:14:35,225 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-15 19:14:35,420 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 [2024-09-15 19:14:35,421 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:35,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-15 19:14:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339000700] [2024-09-15 19:14:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:14:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:14:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:14:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:14:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:14:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 19:14:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 19:14:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 19:14:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 19:14:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:14:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 19:14:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 19:14:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-15 19:14:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-15 19:14:35,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:35,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339000700] [2024-09-15 19:14:35,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339000700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:35,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899375117] [2024-09-15 19:14:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:14:35,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:35,579 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) [2024-09-15 19:14:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 19:14:35,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:14:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:35,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 19:14:35,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-15 19:14:35,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-15 19:14:35,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899375117] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:35,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:14:35,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-15 19:14:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64564924] [2024-09-15 19:14:35,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:35,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:14:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:14:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:14:35,814 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) [2024-09-15 19:14:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:37,304 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-15 19:14:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:14:37,305 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 [2024-09-15 19:14:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:37,311 INFO L225 Difference]: With dead ends: 1291 [2024-09-15 19:14:37,311 INFO L226 Difference]: Without dead ends: 1286 [2024-09-15 19:14:37,312 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 [2024-09-15 19:14:37,312 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 [2024-09-15 19:14:37,312 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] [2024-09-15 19:14:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-15 19:14:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-15 19:14:38,442 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) [2024-09-15 19:14:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-15 19:14:38,447 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-15 19:14:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:38,447 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-15 19:14:38,448 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) [2024-09-15 19:14:38,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-15 19:14:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-15 19:14:38,449 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:38,449 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] [2024-09-15 19:14:38,456 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-15 19:14:38,653 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 [2024-09-15 19:14:38,654 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:38,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-15 19:14:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:38,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815555452] [2024-09-15 19:14:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579965204] [2024-09-15 19:14:38,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:14:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:38,682 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) [2024-09-15 19:14:38,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 19:14:38,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:14:38,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:38,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-15 19:14:38,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-09-15 19:14:39,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-15 19:14:42,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815555452] [2024-09-15 19:14:42,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579965204] [2024-09-15 19:14:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579965204] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:42,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:42,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2024-09-15 19:14:42,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397191042] [2024-09-15 19:14:42,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:42,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 19:14:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 19:14:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:14:42,878 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) [2024-09-15 19:14:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:55,932 INFO L93 Difference]: Finished difference Result 1600 states and 2597 transitions. [2024-09-15 19:14:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-15 19:14:55,934 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 [2024-09-15 19:14:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:55,946 INFO L225 Difference]: With dead ends: 1600 [2024-09-15 19:14:55,946 INFO L226 Difference]: Without dead ends: 1594 [2024-09-15 19:14:55,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1713, Invalid=6659, Unknown=0, NotChecked=0, Total=8372 [2024-09-15 19:14:55,949 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 315 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:55,949 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1050 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-09-15 19:14:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2024-09-15 19:14:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1405. [2024-09-15 19:14:57,651 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) [2024-09-15 19:14:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2281 transitions. [2024-09-15 19:14:57,659 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2281 transitions. Word has length 112 [2024-09-15 19:14:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:57,659 INFO L474 AbstractCegarLoop]: Abstraction has 1405 states and 2281 transitions. [2024-09-15 19:14:57,659 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) [2024-09-15 19:14:57,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2281 transitions. [2024-09-15 19:14:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-15 19:14:57,661 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:57,662 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] [2024-09-15 19:14:57,668 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-15 19:14:57,865 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 [2024-09-15 19:14:57,866 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:57,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-15 19:14:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460995283] [2024-09-15 19:14:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667448286] [2024-09-15 19:14:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:14:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:57,884 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) [2024-09-15 19:14:57,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 19:14:57,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 19:14:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:57,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 19:14:57,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-15 19:14:58,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:15:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-15 19:15:01,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:15:01,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460995283] [2024-09-15 19:15:01,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:15:01,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667448286] [2024-09-15 19:15:01,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667448286] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:15:01,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:15:01,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-15 19:15:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506080707] [2024-09-15 19:15:01,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:15:01,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 19:15:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:15:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 19:15:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:15:01,553 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) [2024-09-15 19:15:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:15:19,600 INFO L93 Difference]: Finished difference Result 1718 states and 2761 transitions. [2024-09-15 19:15:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-09-15 19:15:19,600 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 [2024-09-15 19:15:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:15:19,610 INFO L225 Difference]: With dead ends: 1718 [2024-09-15 19:15:19,610 INFO L226 Difference]: Without dead ends: 1712 [2024-09-15 19:15:19,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-09-15 19:15:19,613 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 [2024-09-15 19:15:19,613 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] [2024-09-15 19:15:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2024-09-15 19:15:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1560. [2024-09-15 19:15:21,758 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) [2024-09-15 19:15:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2527 transitions. [2024-09-15 19:15:21,768 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2527 transitions. Word has length 115 [2024-09-15 19:15:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:15:21,768 INFO L474 AbstractCegarLoop]: Abstraction has 1560 states and 2527 transitions. [2024-09-15 19:15:21,768 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) [2024-09-15 19:15:21,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:15:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2527 transitions. [2024-09-15 19:15:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-15 19:15:21,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:15:21,770 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] [2024-09-15 19:15:21,777 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-15 19:15:21,974 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 [2024-09-15 19:15:21,975 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:15:21,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:15:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-15 19:15:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:15:21,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495673594] [2024-09-15 19:15:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:15:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:15:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:15:21,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777456632] [2024-09-15 19:15:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:15:21,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:15:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:15:21,991 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) [2024-09-15 19:15:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 19:15:22,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:15:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:15:22,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-15 19:15:22,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:15:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-15 19:15:23,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:15:29,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:15:29,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495673594] [2024-09-15 19:15:29,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:15:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777456632] [2024-09-15 19:15:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777456632] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:15:29,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:15:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-15 19:15:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82756636] [2024-09-15 19:15:29,329 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:15:29,329 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:15:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:15:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:15:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 19:15:29,330 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) [2024-09-15 19:15:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:15:33,787 INFO L93 Difference]: Finished difference Result 1699 states and 2735 transitions. [2024-09-15 19:15:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 19:15:33,787 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 [2024-09-15 19:15:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:15:33,795 INFO L225 Difference]: With dead ends: 1699 [2024-09-15 19:15:33,795 INFO L226 Difference]: Without dead ends: 1694 [2024-09-15 19:15:33,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 19:15:33,797 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 85 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:15:33,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 817 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 19:15:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2024-09-15 19:15:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1674. [2024-09-15 19:15:36,212 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) [2024-09-15 19:15:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2710 transitions. [2024-09-15 19:15:36,218 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2710 transitions. Word has length 115 [2024-09-15 19:15:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:15:36,218 INFO L474 AbstractCegarLoop]: Abstraction has 1674 states and 2710 transitions. [2024-09-15 19:15:36,218 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) [2024-09-15 19:15:36,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:15:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2710 transitions. [2024-09-15 19:15:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-15 19:15:36,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:15:36,220 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] [2024-09-15 19:15:36,233 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-15 19:15:36,424 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 [2024-09-15 19:15:36,425 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:15:36,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:15:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-15 19:15:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:15:36,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875026399] [2024-09-15 19:15:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:15:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:15:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:15:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673821083] [2024-09-15 19:15:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 19:15:36,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:15:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:15:36,453 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) [2024-09-15 19:15:36,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 19:15:36,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-15 19:15:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:15:36,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-15 19:15:36,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:15:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-09-15 19:15:37,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:15:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-15 19:15:40,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:15:40,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875026399] [2024-09-15 19:15:40,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:15:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673821083] [2024-09-15 19:15:40,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673821083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:15:40,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:15:40,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-09-15 19:15:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843193719] [2024-09-15 19:15:40,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:15:40,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 19:15:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:15:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 19:15:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:15:40,089 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) [2024-09-15 19:15:49,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:16:20,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:16:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:16:36,832 INFO L93 Difference]: Finished difference Result 2484 states and 4022 transitions. [2024-09-15 19:16:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-09-15 19:16:36,833 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 [2024-09-15 19:16:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:16:36,845 INFO L225 Difference]: With dead ends: 2484 [2024-09-15 19:16:36,845 INFO L226 Difference]: Without dead ends: 2478 [2024-09-15 19:16:36,849 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=2412, Invalid=13338, Unknown=0, NotChecked=0, Total=15750 [2024-09-15 19:16:36,849 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 324 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s 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, 14.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:16:36,850 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1433 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2024-09-15 19:16:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2024-09-15 19:16:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1771. [2024-09-15 19:16:39,940 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) [2024-09-15 19:16:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2862 transitions. [2024-09-15 19:16:39,947 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2862 transitions. Word has length 120 [2024-09-15 19:16:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:16:39,948 INFO L474 AbstractCegarLoop]: Abstraction has 1771 states and 2862 transitions. [2024-09-15 19:16:39,948 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) [2024-09-15 19:16:39,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:16:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2862 transitions. [2024-09-15 19:16:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-15 19:16:39,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:16:39,950 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] [2024-09-15 19:16:39,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-15 19:16:40,154 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 [2024-09-15 19:16:40,155 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:16:40,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:16:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-15 19:16:40,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:16:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580954645] [2024-09-15 19:16:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:16:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:16:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:16:40,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287429027] [2024-09-15 19:16:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 19:16:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:16:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:16:40,170 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) [2024-09-15 19:16:40,171 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 19:16:40,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-15 19:16:40,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:16:40,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-15 19:16:40,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:16:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-15 19:16:41,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:16:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-15 19:16:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:16:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580954645] [2024-09-15 19:16:45,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:16:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287429027] [2024-09-15 19:16:45,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287429027] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:16:45,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:16:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2024-09-15 19:16:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878477467] [2024-09-15 19:16:45,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:16:45,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 19:16:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:16:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 19:16:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:16:45,671 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) [2024-09-15 19:16:50,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:17:05,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:17:09,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:17:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:17:18,648 INFO L93 Difference]: Finished difference Result 2892 states and 4748 transitions. [2024-09-15 19:17:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-15 19:17:18,648 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 [2024-09-15 19:17:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:17:18,661 INFO L225 Difference]: With dead ends: 2892 [2024-09-15 19:17:18,662 INFO L226 Difference]: Without dead ends: 2886 [2024-09-15 19:17:18,664 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 [2024-09-15 19:17:18,665 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 292 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s 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, 19.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:17:18,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1230 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1541 Invalid, 2 Unknown, 0 Unchecked, 19.2s Time] [2024-09-15 19:17:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2024-09-15 19:17:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2076. [2024-09-15 19:17:22,393 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) [2024-09-15 19:17:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3361 transitions. [2024-09-15 19:17:22,402 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3361 transitions. Word has length 132 [2024-09-15 19:17:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:17:22,402 INFO L474 AbstractCegarLoop]: Abstraction has 2076 states and 3361 transitions. [2024-09-15 19:17:22,404 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) [2024-09-15 19:17:22,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:17:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3361 transitions. [2024-09-15 19:17:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-15 19:17:22,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:17:22,407 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] [2024-09-15 19:17:22,419 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-15 19:17:22,610 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 [2024-09-15 19:17:22,611 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:17:22,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:17:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 972510395, now seen corresponding path program 7 times [2024-09-15 19:17:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:17:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700860401] [2024-09-15 19:17:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:17:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:17:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:17:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758903452] [2024-09-15 19:17:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 19:17:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:17:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:17:22,648 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) [2024-09-15 19:17:22,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 19:17:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:17:22,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-15 19:17:22,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:17:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-15 19:17:24,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:17:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:17:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700860401] [2024-09-15 19:17:29,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:17:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758903452] [2024-09-15 19:17:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758903452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:17:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:17:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-15 19:17:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197254305] [2024-09-15 19:17:29,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:17:29,852 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:17:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:17:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:17:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 19:17:29,853 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) [2024-09-15 19:17:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:17:35,379 INFO L93 Difference]: Finished difference Result 2239 states and 3615 transitions. [2024-09-15 19:17:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 19:17:35,380 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 [2024-09-15 19:17:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:17:35,397 INFO L225 Difference]: With dead ends: 2239 [2024-09-15 19:17:35,397 INFO L226 Difference]: Without dead ends: 2234 [2024-09-15 19:17:35,398 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 [2024-09-15 19:17:35,398 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 [2024-09-15 19:17:35,398 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] [2024-09-15 19:17:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2024-09-15 19:17:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2111. [2024-09-15 19:17:39,257 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) [2024-09-15 19:17:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3415 transitions. [2024-09-15 19:17:39,269 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3415 transitions. Word has length 137 [2024-09-15 19:17:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:17:39,269 INFO L474 AbstractCegarLoop]: Abstraction has 2111 states and 3415 transitions. [2024-09-15 19:17:39,269 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) [2024-09-15 19:17:39,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:17:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3415 transitions. [2024-09-15 19:17:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-15 19:17:39,272 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:17:39,272 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] [2024-09-15 19:17:39,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-15 19:17:39,472 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 [2024-09-15 19:17:39,473 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:17:39,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:17:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-09-15 19:17:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:17:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509162092] [2024-09-15 19:17:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:17:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:17:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:17:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311323304] [2024-09-15 19:17:39,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:17:39,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:17:39,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:17:39,503 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) [2024-09-15 19:17:39,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-15 19:17:39,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:17:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:17:39,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-15 19:17:39,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:17:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-15 19:17:40,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:17:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-15 19:17:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:17:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509162092] [2024-09-15 19:17:44,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:17:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311323304] [2024-09-15 19:17:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311323304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:17:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:17:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2024-09-15 19:17:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623869669] [2024-09-15 19:17:44,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:17:44,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 19:17:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:17:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 19:17:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 19:17:44,619 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) [2024-09-15 19:18:05,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:18:22,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []