./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --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 a9b967e5 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/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:38:42,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:38:42,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:38:42,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:38:42,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:38:42,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:38:42,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:38:42,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:38:42,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:38:42,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:38:42,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:38:42,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:38:42,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:38:42,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:38:42,820 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:38:42,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:38:42,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:38:42,824 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:38:42,825 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:38:42,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:38:42,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:38:42,826 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:38:42,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:38:42,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:38:42,827 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:38:42,827 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:38:42,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:38:42,827 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:38:42,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:38:42,828 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:38:42,828 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:38:42,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:38:42,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:38:42,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:38:42,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:38:42,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:38:42,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:38:42,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:38:42,831 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:38:42,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:38:42,831 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:38:42,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:38:42,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:38:43,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:38:43,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:38:43,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:38:43,127 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:38:43,128 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:38:43,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-11 19:38:44,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:38:44,813 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:38:44,814 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-11 19:38:44,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9cf08d5ca/aaae29cce52644ddb81be0c554d07c21/FLAGc2b142239 [2024-09-11 19:38:44,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9cf08d5ca/aaae29cce52644ddb81be0c554d07c21 [2024-09-11 19:38:44,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:38:44,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:38:44,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:38:44,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:38:44,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:38:44,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:38:44" (1/1) ... [2024-09-11 19:38:44,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1af7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:44, skipping insertion in model container [2024-09-11 19:38:44,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:38:44" (1/1) ... [2024-09-11 19:38:44,867 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:38:45,011 WARN L247 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/egcd2-ll.c[490,503] [2024-09-11 19:38:45,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:38:45,042 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:38:45,054 WARN L247 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/egcd2-ll.c[490,503] [2024-09-11 19:38:45,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:38:45,089 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:38:45,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45 WrapperNode [2024-09-11 19:38:45,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:38:45,090 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:38:45,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:38:45,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:38:45,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,129 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-09-11 19:38:45,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:38:45,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:38:45,132 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:38:45,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:38:45,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,161 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]. [2024-09-11 19:38:45,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,175 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:38:45,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:38:45,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:38:45,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:38:45,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (1/1) ... [2024-09-11 19:38:45,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:38:45,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:45,213 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) [2024-09-11 19:38:45,215 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 [2024-09-11 19:38:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:38:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:38:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:38:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:38:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:38:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:38:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:38:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:38:45,332 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:38:45,337 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:38:45,532 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 19:38:45,532 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:38:45,567 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:38:45,568 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:38:45,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:38:45 BoogieIcfgContainer [2024-09-11 19:38:45,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:38:45,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:38:45,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:38:45,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:38:45,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:38:44" (1/3) ... [2024-09-11 19:38:45,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3642e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:38:45, skipping insertion in model container [2024-09-11 19:38:45,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:45" (2/3) ... [2024-09-11 19:38:45,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3642e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:38:45, skipping insertion in model container [2024-09-11 19:38:45,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:38:45" (3/3) ... [2024-09-11 19:38:45,579 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-11 19:38:45,597 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:38:45,597 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:38:45,660 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:38:45,669 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;@381dd666, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:38:45,670 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:38:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 19:38:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 19:38:45,684 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:45,685 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:45,685 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:45,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 883046315, now seen corresponding path program 1 times [2024-09-11 19:38:45,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:45,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203658938] [2024-09-11 19:38:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:45,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:45,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:45,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:45,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:38:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:45,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:38:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:38:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203658938] [2024-09-11 19:38:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203658938] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:45,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:45,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:38:45,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919056360] [2024-09-11 19:38:45,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:45,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:38:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:38:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:38:45,940 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:45,971 INFO L93 Difference]: Finished difference Result 56 states and 95 transitions. [2024-09-11 19:38:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:38:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-11 19:38:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:45,979 INFO L225 Difference]: With dead ends: 56 [2024-09-11 19:38:45,980 INFO L226 Difference]: Without dead ends: 27 [2024-09-11 19:38:45,983 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:38:45,986 INFO L434 NwaCegarLoop]: 36 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, 36 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 [2024-09-11 19:38:45,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-11 19:38:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-11 19:38:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 19:38:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-11 19:38:46,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 27 [2024-09-11 19:38:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:46,025 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-11 19:38:46,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-11 19:38:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:38:46,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:46,028 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:46,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:38:46,029 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:46,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash -296693581, now seen corresponding path program 1 times [2024-09-11 19:38:46,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:46,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74334444] [2024-09-11 19:38:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:38:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:38:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:38:46,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:46,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74334444] [2024-09-11 19:38:46,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74334444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:46,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709399067] [2024-09-11 19:38:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:46,376 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) [2024-09-11 19:38:46,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:38:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:46,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:38:46,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:38:46,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709399067] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:46,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:46,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-11 19:38:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891874175] [2024-09-11 19:38:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:46,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:38:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:38:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:38:46,657 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:46,788 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-09-11 19:38:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:38:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-11 19:38:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:46,790 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:38:46,790 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 19:38:46,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:38:46,791 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:46,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 19:38:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-11 19:38:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 19:38:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2024-09-11 19:38:46,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 28 [2024-09-11 19:38:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:46,821 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2024-09-11 19:38:46,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:46,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2024-09-11 19:38:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:38:46,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:46,823 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] [2024-09-11 19:38:46,839 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:38:47,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:47,026 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:47,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash -603309185, now seen corresponding path program 1 times [2024-09-11 19:38:47,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:47,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949827157] [2024-09-11 19:38:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:47,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044170558] [2024-09-11 19:38:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:47,062 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) [2024-09-11 19:38:47,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:38:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:38:47,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:38:47,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:47,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:47,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949827157] [2024-09-11 19:38:47,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044170558] [2024-09-11 19:38:47,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044170558] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:47,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:47,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708756760] [2024-09-11 19:38:47,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:47,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:47,193 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:38:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:47,258 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2024-09-11 19:38:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-09-11 19:38:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:47,261 INFO L225 Difference]: With dead ends: 59 [2024-09-11 19:38:47,261 INFO L226 Difference]: Without dead ends: 57 [2024-09-11 19:38:47,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:47,263 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:47,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-11 19:38:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-09-11 19:38:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 30 states have internal predecessors, (31), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-11 19:38:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-11 19:38:47,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 29 [2024-09-11 19:38:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:47,279 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-11 19:38:47,279 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:38:47,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-11 19:38:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 19:38:47,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:47,281 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] [2024-09-11 19:38:47,298 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:38:47,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:47,486 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:47,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1153692469, now seen corresponding path program 1 times [2024-09-11 19:38:47,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:47,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783846607] [2024-09-11 19:38:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:47,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:38:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:38:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 19:38:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:38:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:47,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783846607] [2024-09-11 19:38:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783846607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196660426] [2024-09-11 19:38:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:47,682 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) [2024-09-11 19:38:47,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:38:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:47,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:38:47,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:38:47,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:47,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196660426] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:47,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:47,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-11 19:38:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678384466] [2024-09-11 19:38:47,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:47,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:47,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:47,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:38:47,869 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:47,951 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-09-11 19:38:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-11 19:38:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:47,952 INFO L225 Difference]: With dead ends: 56 [2024-09-11 19:38:47,954 INFO L226 Difference]: Without dead ends: 52 [2024-09-11 19:38:47,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:38:47,955 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:47,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-11 19:38:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-09-11 19:38:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:38:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-09-11 19:38:47,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 33 [2024-09-11 19:38:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:47,975 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-09-11 19:38:47,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:47,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-09-11 19:38:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-11 19:38:47,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:47,979 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] [2024-09-11 19:38:47,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:48,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:48,184 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:48,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash 626438719, now seen corresponding path program 1 times [2024-09-11 19:38:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:48,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408832485] [2024-09-11 19:38:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365134883] [2024-09-11 19:38:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:48,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:48,203 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) [2024-09-11 19:38:48,205 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:38:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:48,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:38:48,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:38:48,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:48,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408832485] [2024-09-11 19:38:48,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:48,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365134883] [2024-09-11 19:38:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365134883] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:48,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003315181] [2024-09-11 19:38:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:48,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:48,433 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:38:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:48,514 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-09-11 19:38:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-09-11 19:38:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:48,516 INFO L225 Difference]: With dead ends: 58 [2024-09-11 19:38:48,516 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 19:38:48,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:48,517 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:48,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 19:38:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-11 19:38:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:38:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-09-11 19:38:48,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 44 [2024-09-11 19:38:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:48,535 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-09-11 19:38:48,535 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:38:48,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-09-11 19:38:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-11 19:38:48,537 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:48,537 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] [2024-09-11 19:38:48,554 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:38:48,741 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:48,742 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:48,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1696967842, now seen corresponding path program 1 times [2024-09-11 19:38:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595009211] [2024-09-11 19:38:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879228571] [2024-09-11 19:38:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:48,763 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) [2024-09-11 19:38:48,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:38:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:48,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-11 19:38:48,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:38:48,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:38:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595009211] [2024-09-11 19:38:49,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879228571] [2024-09-11 19:38:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879228571] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:49,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:49,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-11 19:38:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555998943] [2024-09-11 19:38:49,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:49,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:38:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:38:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:38:49,033 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 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) [2024-09-11 19:38:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:49,142 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-09-11 19:38:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:38:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 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 [2024-09-11 19:38:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:49,145 INFO L225 Difference]: With dead ends: 83 [2024-09-11 19:38:49,146 INFO L226 Difference]: Without dead ends: 81 [2024-09-11 19:38:49,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:38:49,148 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:49,149 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 129 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-11 19:38:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2024-09-11 19:38:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-11 19:38:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-11 19:38:49,171 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 51 [2024-09-11 19:38:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:49,174 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-11 19:38:49,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 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) [2024-09-11 19:38:49,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-11 19:38:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-11 19:38:49,175 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:49,175 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-09-11 19:38:49,192 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:49,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:38:49,380 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:49,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1106872408, now seen corresponding path program 1 times [2024-09-11 19:38:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:49,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820002941] [2024-09-11 19:38:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:38:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:38:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 19:38:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 19:38:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-11 19:38:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-11 19:38:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-11 19:38:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820002941] [2024-09-11 19:38:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820002941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240576708] [2024-09-11 19:38:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:49,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:49,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:49,579 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) [2024-09-11 19:38:49,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:38:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:49,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:38:49,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-11 19:38:49,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-11 19:38:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240576708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:49,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:38:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-11 19:38:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246018723] [2024-09-11 19:38:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:49,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:38:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:38:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:38:49,791 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 19:38:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:49,965 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2024-09-11 19:38:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:38:49,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2024-09-11 19:38:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:49,967 INFO L225 Difference]: With dead ends: 98 [2024-09-11 19:38:49,967 INFO L226 Difference]: Without dead ends: 90 [2024-09-11 19:38:49,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:38:49,968 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:49,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 265 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-11 19:38:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-09-11 19:38:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-11 19:38:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2024-09-11 19:38:50,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 53 [2024-09-11 19:38:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:50,002 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2024-09-11 19:38:50,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 19:38:50,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2024-09-11 19:38:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-11 19:38:50,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:50,006 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2024-09-11 19:38:50,025 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:50,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:50,207 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:50,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:50,208 INFO L85 PathProgramCache]: Analyzing trace with hash 355794356, now seen corresponding path program 1 times [2024-09-11 19:38:50,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:50,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660651666] [2024-09-11 19:38:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711465502] [2024-09-11 19:38:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:50,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:50,230 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) [2024-09-11 19:38:50,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:38:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:50,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:38:50,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-11 19:38:50,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-11 19:38:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660651666] [2024-09-11 19:38:51,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711465502] [2024-09-11 19:38:51,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711465502] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:51,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:51,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2024-09-11 19:38:51,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241822029] [2024-09-11 19:38:51,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:51,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:38:51,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:38:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:38:51,315 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-11 19:38:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:52,213 INFO L93 Difference]: Finished difference Result 109 states and 152 transitions. [2024-09-11 19:38:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:38:52,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 59 [2024-09-11 19:38:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:52,216 INFO L225 Difference]: With dead ends: 109 [2024-09-11 19:38:52,216 INFO L226 Difference]: Without dead ends: 106 [2024-09-11 19:38:52,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:38:52,217 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:52,217 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 348 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:38:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-11 19:38:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-09-11 19:38:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:38:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2024-09-11 19:38:52,261 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 59 [2024-09-11 19:38:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:52,263 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2024-09-11 19:38:52,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-11 19:38:52,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2024-09-11 19:38:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 19:38:52,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:52,264 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] [2024-09-11 19:38:52,283 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:38:52,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:52,465 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:52,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash 239702314, now seen corresponding path program 2 times [2024-09-11 19:38:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:52,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019599470] [2024-09-11 19:38:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:52,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:52,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590551888] [2024-09-11 19:38:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:38:52,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:52,492 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) [2024-09-11 19:38:52,494 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:38:52,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:38:52,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:52,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 19:38:52,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:38:52,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:52,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019599470] [2024-09-11 19:38:52,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590551888] [2024-09-11 19:38:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590551888] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-11 19:38:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172030007] [2024-09-11 19:38:52,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:52,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:38:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:38:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:38:52,821 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:38:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:52,984 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2024-09-11 19:38:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:38:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-09-11 19:38:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:52,986 INFO L225 Difference]: With dead ends: 120 [2024-09-11 19:38:52,986 INFO L226 Difference]: Without dead ends: 118 [2024-09-11 19:38:52,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:38:52,987 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:52,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 166 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-11 19:38:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-09-11 19:38:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.171875) internal successors, (75), 66 states have internal predecessors, (75), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-09-11 19:38:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2024-09-11 19:38:53,040 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 64 [2024-09-11 19:38:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:53,041 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2024-09-11 19:38:53,041 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:38:53,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2024-09-11 19:38:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 19:38:53,044 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:53,044 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-09-11 19:38:53,058 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:53,245 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:53,246 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:53,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1133629236, now seen corresponding path program 3 times [2024-09-11 19:38:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:53,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221099605] [2024-09-11 19:38:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:53,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825240194] [2024-09-11 19:38:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:38:53,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:53,271 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) [2024-09-11 19:38:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:38:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:38:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:53,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:38:53,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-09-11 19:38:53,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:54,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221099605] [2024-09-11 19:38:54,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825240194] [2024-09-11 19:38:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825240194] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:54,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-11 19:38:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139810115] [2024-09-11 19:38:54,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:54,244 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:38:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:38:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:38:54,245 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:38:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:54,663 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2024-09-11 19:38:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:38:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2024-09-11 19:38:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:54,664 INFO L225 Difference]: With dead ends: 124 [2024-09-11 19:38:54,664 INFO L226 Difference]: Without dead ends: 122 [2024-09-11 19:38:54,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:38:54,665 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:54,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 203 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:38:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-11 19:38:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2024-09-11 19:38:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-09-11 19:38:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2024-09-11 19:38:54,700 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 69 [2024-09-11 19:38:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:54,700 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2024-09-11 19:38:54,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:38:54,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2024-09-11 19:38:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 19:38:54,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:54,701 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2024-09-11 19:38:54,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 19:38:54,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 19:38:54,902 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:54,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1982553465, now seen corresponding path program 1 times [2024-09-11 19:38:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:54,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227427474] [2024-09-11 19:38:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:54,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318374484] [2024-09-11 19:38:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:54,926 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) [2024-09-11 19:38:54,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:38:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:54,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 19:38:54,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-11 19:38:55,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-11 19:38:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227427474] [2024-09-11 19:38:56,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318374484] [2024-09-11 19:38:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318374484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:56,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-11 19:38:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814010978] [2024-09-11 19:38:56,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:56,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:38:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:38:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:38:56,416 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-11 19:38:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:59,283 INFO L93 Difference]: Finished difference Result 204 states and 289 transitions. [2024-09-11 19:38:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:38:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 75 [2024-09-11 19:38:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:59,285 INFO L225 Difference]: With dead ends: 204 [2024-09-11 19:38:59,285 INFO L226 Difference]: Without dead ends: 200 [2024-09-11 19:38:59,286 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:38:59,286 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 80 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:59,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 410 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 19:38:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-09-11 19:38:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2024-09-11 19:38:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-11 19:38:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 278 transitions. [2024-09-11 19:38:59,364 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 278 transitions. Word has length 75 [2024-09-11 19:38:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:59,364 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 278 transitions. [2024-09-11 19:38:59,365 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-11 19:38:59,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 278 transitions. [2024-09-11 19:38:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-11 19:38:59,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:59,366 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:59,383 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 19:38:59,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:38:59,567 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:59,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1975410273, now seen corresponding path program 4 times [2024-09-11 19:38:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:59,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776842089] [2024-09-11 19:38:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:59,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:38:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:38:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 19:38:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 19:38:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-11 19:38:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-11 19:38:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-11 19:38:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:38:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:38:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-11 19:38:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-11 19:38:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-11 19:38:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-11 19:38:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776842089] [2024-09-11 19:38:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776842089] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:59,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434400703] [2024-09-11 19:38:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:59,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:59,690 INFO L87 Difference]: Start difference. First operand 196 states and 278 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-11 19:38:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:59,832 INFO L93 Difference]: Finished difference Result 249 states and 350 transitions. [2024-09-11 19:38:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:38:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2024-09-11 19:38:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:59,834 INFO L225 Difference]: With dead ends: 249 [2024-09-11 19:38:59,835 INFO L226 Difference]: Without dead ends: 177 [2024-09-11 19:38:59,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:38:59,838 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:59,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-11 19:38:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2024-09-11 19:38:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-09-11 19:38:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 221 transitions. [2024-09-11 19:38:59,889 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 221 transitions. Word has length 89 [2024-09-11 19:38:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:59,889 INFO L474 AbstractCegarLoop]: Abstraction has 163 states and 221 transitions. [2024-09-11 19:38:59,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-11 19:38:59,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 221 transitions. [2024-09-11 19:38:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-11 19:38:59,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:59,891 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-09-11 19:38:59,891 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-11 19:38:59,891 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:59,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -708551661, now seen corresponding path program 1 times [2024-09-11 19:38:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:59,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257577671] [2024-09-11 19:38:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107017805] [2024-09-11 19:38:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:59,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:59,916 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) [2024-09-11 19:38:59,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:38:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:59,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-11 19:38:59,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-11 19:39:00,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:01,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257577671] [2024-09-11 19:39:01,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107017805] [2024-09-11 19:39:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107017805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:39:01,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:39:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:39:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866455512] [2024-09-11 19:39:01,157 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:01,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:39:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:39:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:39:01,158 INFO L87 Difference]: Start difference. First operand 163 states and 221 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 19:39:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:01,818 INFO L93 Difference]: Finished difference Result 173 states and 230 transitions. [2024-09-11 19:39:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:39:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 91 [2024-09-11 19:39:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:01,820 INFO L225 Difference]: With dead ends: 173 [2024-09-11 19:39:01,820 INFO L226 Difference]: Without dead ends: 171 [2024-09-11 19:39:01,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:39:01,821 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:01,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 347 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:39:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-11 19:39:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2024-09-11 19:39:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 49 states have call successors, (49), 12 states have call predecessors, (49), 12 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-11 19:39:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2024-09-11 19:39:01,882 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 91 [2024-09-11 19:39:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:01,883 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2024-09-11 19:39:01,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 19:39:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2024-09-11 19:39:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-09-11 19:39:01,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:01,885 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:01,901 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:39:02,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:02,086 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash 694624748, now seen corresponding path program 2 times [2024-09-11 19:39:02,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766021393] [2024-09-11 19:39:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:02,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272901378] [2024-09-11 19:39:02,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:39:02,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:02,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:02,117 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) [2024-09-11 19:39:02,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:39:02,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:39:02,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:39:02,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:39:02,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-11 19:39:02,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-11 19:39:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766021393] [2024-09-11 19:39:03,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272901378] [2024-09-11 19:39:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272901378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:39:03,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:39:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-11 19:39:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933387867] [2024-09-11 19:39:03,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:03,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:39:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:39:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:39:03,787 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-11 19:39:06,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:39:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:08,495 INFO L93 Difference]: Finished difference Result 218 states and 305 transitions. [2024-09-11 19:39:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 19:39:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 108 [2024-09-11 19:39:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:08,497 INFO L225 Difference]: With dead ends: 218 [2024-09-11 19:39:08,498 INFO L226 Difference]: Without dead ends: 216 [2024-09-11 19:39:08,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 19:39:08,499 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:08,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 671 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-11 19:39:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-11 19:39:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 182. [2024-09-11 19:39:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2024-09-11 19:39:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2024-09-11 19:39:08,628 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 108 [2024-09-11 19:39:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:08,628 INFO L474 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2024-09-11 19:39:08,629 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-11 19:39:08,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2024-09-11 19:39:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-09-11 19:39:08,630 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:08,630 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:08,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 19:39:08,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:39:08,835 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:08,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash 47402912, now seen corresponding path program 3 times [2024-09-11 19:39:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055453548] [2024-09-11 19:39:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797743120] [2024-09-11 19:39:08,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:39:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:08,873 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) [2024-09-11 19:39:08,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:39:08,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:39:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:39:08,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-11 19:39:08,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-11 19:39:09,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-11 19:39:13,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055453548] [2024-09-11 19:39:13,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797743120] [2024-09-11 19:39:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797743120] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:39:13,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:39:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2024-09-11 19:39:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541828267] [2024-09-11 19:39:13,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:13,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 19:39:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 19:39:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:39:13,127 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) [2024-09-11 19:39:23,183 WARN L293 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:39:27,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:39:33,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:39:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:42,735 INFO L93 Difference]: Finished difference Result 288 states and 404 transitions. [2024-09-11 19:39:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 19:39:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) Word has length 111 [2024-09-11 19:39:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:42,739 INFO L225 Difference]: With dead ends: 288 [2024-09-11 19:39:42,739 INFO L226 Difference]: Without dead ends: 286 [2024-09-11 19:39:42,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 19:39:42,742 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 144 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:42,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 611 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 720 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2024-09-11 19:39:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-09-11 19:39:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2024-09-11 19:39:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 141 states have internal predecessors, (163), 101 states have call successors, (101), 20 states have call predecessors, (101), 20 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2024-09-11 19:39:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 364 transitions. [2024-09-11 19:39:42,927 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 364 transitions. Word has length 111 [2024-09-11 19:39:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:42,928 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 364 transitions. [2024-09-11 19:39:42,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) [2024-09-11 19:39:42,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 364 transitions. [2024-09-11 19:39:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-11 19:39:42,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:42,930 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:42,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 19:39:43,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:39:43,131 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:43,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1753585742, now seen corresponding path program 4 times [2024-09-11 19:39:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132341347] [2024-09-11 19:39:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:43,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:43,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946554597] [2024-09-11 19:39:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:39:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:43,152 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) [2024-09-11 19:39:43,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 19:39:43,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:39:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:39:43,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 19:39:43,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-11 19:39:44,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132341347] [2024-09-11 19:39:44,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946554597] [2024-09-11 19:39:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946554597] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:39:44,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:39:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 19:39:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890885010] [2024-09-11 19:39:44,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:44,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:39:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:39:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:39:44,592 INFO L87 Difference]: Start difference. First operand 262 states and 364 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-11 19:39:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:45,636 INFO L93 Difference]: Finished difference Result 303 states and 422 transitions. [2024-09-11 19:39:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 19:39:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2024-09-11 19:39:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:45,640 INFO L225 Difference]: With dead ends: 303 [2024-09-11 19:39:45,640 INFO L226 Difference]: Without dead ends: 301 [2024-09-11 19:39:45,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:39:45,641 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 25 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:45,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 443 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:39:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-09-11 19:39:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2024-09-11 19:39:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 158 states have internal predecessors, (183), 117 states have call successors, (117), 22 states have call predecessors, (117), 22 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2024-09-11 19:39:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 416 transitions. [2024-09-11 19:39:45,876 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 416 transitions. Word has length 113 [2024-09-11 19:39:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:45,877 INFO L474 AbstractCegarLoop]: Abstraction has 297 states and 416 transitions. [2024-09-11 19:39:45,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-11 19:39:45,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 416 transitions. [2024-09-11 19:39:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-09-11 19:39:45,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:45,879 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:45,897 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-11 19:39:46,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:39:46,084 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1094014338, now seen corresponding path program 5 times [2024-09-11 19:39:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:46,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828711956] [2024-09-11 19:39:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443427013] [2024-09-11 19:39:46,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:39:46,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:46,118 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) [2024-09-11 19:39:46,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 19:39:46,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-11 19:39:46,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:39:46,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:39:46,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 82 proven. 66 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-11 19:39:49,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:50,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828711956] [2024-09-11 19:39:50,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443427013] [2024-09-11 19:39:50,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443427013] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:39:50,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:39:50,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:39:50,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636875630] [2024-09-11 19:39:50,245 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:50,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:39:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:39:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:39:50,246 INFO L87 Difference]: Start difference. First operand 297 states and 416 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-11 19:39:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:54,148 INFO L93 Difference]: Finished difference Result 331 states and 462 transitions. [2024-09-11 19:39:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:39:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2024-09-11 19:39:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:54,151 INFO L225 Difference]: With dead ends: 331 [2024-09-11 19:39:54,151 INFO L226 Difference]: Without dead ends: 329 [2024-09-11 19:39:54,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:39:54,152 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:54,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 495 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-11 19:39:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-09-11 19:39:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2024-09-11 19:39:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 172 states have (on average 1.1627906976744187) internal successors, (200), 173 states have internal predecessors, (200), 129 states have call successors, (129), 24 states have call predecessors, (129), 24 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-11 19:39:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 457 transitions. [2024-09-11 19:39:54,401 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 457 transitions. Word has length 116 [2024-09-11 19:39:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:54,401 INFO L474 AbstractCegarLoop]: Abstraction has 326 states and 457 transitions. [2024-09-11 19:39:54,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-11 19:39:54,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 457 transitions. [2024-09-11 19:39:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-09-11 19:39:54,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:54,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:54,411 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-11 19:39:54,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:39:54,604 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:54,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash -95789487, now seen corresponding path program 2 times [2024-09-11 19:39:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849126278] [2024-09-11 19:39:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219529489] [2024-09-11 19:39:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:39:54,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:54,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:54,633 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) [2024-09-11 19:39:54,637 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 19:39:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:39:54,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:39:54,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-11 19:39:54,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 76 proven. 53 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-11 19:39:55,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-11 19:39:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849126278] [2024-09-11 19:39:57,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219529489] [2024-09-11 19:39:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219529489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:39:57,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:39:57,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-09-11 19:39:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474645126] [2024-09-11 19:39:57,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:57,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 19:39:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 19:39:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:39:57,407 INFO L87 Difference]: Start difference. First operand 326 states and 457 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-11 19:40:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:03,987 INFO L93 Difference]: Finished difference Result 405 states and 561 transitions. [2024-09-11 19:40:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-11 19:40:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) Word has length 122 [2024-09-11 19:40:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:03,991 INFO L225 Difference]: With dead ends: 405 [2024-09-11 19:40:03,991 INFO L226 Difference]: Without dead ends: 397 [2024-09-11 19:40:03,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=589, Invalid=2603, Unknown=0, NotChecked=0, Total=3192 [2024-09-11 19:40:03,993 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 137 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:03,993 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 782 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-09-11 19:40:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-11 19:40:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2024-09-11 19:40:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 184 states have (on average 1.141304347826087) internal successors, (210), 186 states have internal predecessors, (210), 136 states have call successors, (136), 28 states have call predecessors, (136), 28 states have return successors, (135), 134 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-11 19:40:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 481 transitions. [2024-09-11 19:40:04,363 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 481 transitions. Word has length 122 [2024-09-11 19:40:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:04,364 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 481 transitions. [2024-09-11 19:40:04,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-11 19:40:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 481 transitions. [2024-09-11 19:40:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-09-11 19:40:04,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:04,367 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:04,384 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 19:40:04,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:04,568 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:04,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1022074351, now seen corresponding path program 6 times [2024-09-11 19:40:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015169982] [2024-09-11 19:40:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:40:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697820279] [2024-09-11 19:40:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:40:04,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:04,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:04,598 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) [2024-09-11 19:40:04,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 19:40:04,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:40:04,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:40:04,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-11 19:40:04,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 156 proven. 36 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 19:40:06,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:29,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:29,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015169982] [2024-09-11 19:40:29,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:40:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697820279] [2024-09-11 19:40:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697820279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:29,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:40:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:40:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17488162] [2024-09-11 19:40:29,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:29,502 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:40:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:40:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=534, Unknown=1, NotChecked=0, Total=650 [2024-09-11 19:40:29,504 INFO L87 Difference]: Start difference. First operand 349 states and 481 transitions. Second operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 19:40:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:30,669 INFO L93 Difference]: Finished difference Result 378 states and 517 transitions. [2024-09-11 19:40:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:40:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 135 [2024-09-11 19:40:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:30,672 INFO L225 Difference]: With dead ends: 378 [2024-09-11 19:40:30,672 INFO L226 Difference]: Without dead ends: 376 [2024-09-11 19:40:30,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=138, Invalid=617, Unknown=1, NotChecked=0, Total=756 [2024-09-11 19:40:30,673 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:30,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 279 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:40:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-09-11 19:40:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 320. [2024-09-11 19:40:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 172 states have internal predecessors, (193), 121 states have call successors, (121), 28 states have call predecessors, (121), 28 states have return successors, (120), 119 states have call predecessors, (120), 120 states have call successors, (120) [2024-09-11 19:40:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 434 transitions. [2024-09-11 19:40:30,973 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 434 transitions. Word has length 135 [2024-09-11 19:40:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:30,973 INFO L474 AbstractCegarLoop]: Abstraction has 320 states and 434 transitions. [2024-09-11 19:40:30,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 19:40:30,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 434 transitions. [2024-09-11 19:40:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-11 19:40:30,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:30,975 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:30,991 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-11 19:40:31,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:31,175 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:31,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2003649501, now seen corresponding path program 7 times [2024-09-11 19:40:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630280364] [2024-09-11 19:40:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:40:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649554646] [2024-09-11 19:40:31,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:40:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:31,210 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) [2024-09-11 19:40:31,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 19:40:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:31,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-11 19:40:31,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 166 proven. 124 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-11 19:40:33,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:34,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630280364] [2024-09-11 19:40:34,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:40:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649554646] [2024-09-11 19:40:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649554646] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:34,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:40:34,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-11 19:40:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301220171] [2024-09-11 19:40:34,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:34,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:40:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:40:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:40:34,323 INFO L87 Difference]: Start difference. First operand 320 states and 434 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-11 19:40:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:36,099 INFO L93 Difference]: Finished difference Result 330 states and 443 transitions. [2024-09-11 19:40:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 19:40:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2024-09-11 19:40:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:36,102 INFO L225 Difference]: With dead ends: 330 [2024-09-11 19:40:36,102 INFO L226 Difference]: Without dead ends: 328 [2024-09-11 19:40:36,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 19:40:36,105 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:36,105 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 432 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:40:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-09-11 19:40:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2024-09-11 19:40:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 153 states have (on average 1.130718954248366) internal successors, (173), 155 states have internal predecessors, (173), 105 states have call successors, (105), 26 states have call predecessors, (105), 26 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2024-09-11 19:40:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 382 transitions. [2024-09-11 19:40:36,485 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 382 transitions. Word has length 138 [2024-09-11 19:40:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:36,487 INFO L474 AbstractCegarLoop]: Abstraction has 285 states and 382 transitions. [2024-09-11 19:40:36,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-11 19:40:36,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 382 transitions. [2024-09-11 19:40:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-11 19:40:36,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:36,489 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:36,503 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-11 19:40:36,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:36,690 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:36,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1302224961, now seen corresponding path program 8 times [2024-09-11 19:40:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:36,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696440164] [2024-09-11 19:40:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:40:36,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206317055] [2024-09-11 19:40:36,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:40:36,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:36,735 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) [2024-09-11 19:40:36,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 19:40:36,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:40:36,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:40:36,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-11 19:40:36,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 166 proven. 115 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-11 19:40:42,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696440164] [2024-09-11 19:40:43,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:40:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206317055] [2024-09-11 19:40:43,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206317055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:43,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:40:43,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-11 19:40:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888096629] [2024-09-11 19:40:43,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:43,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:40:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:40:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:40:43,696 INFO L87 Difference]: Start difference. First operand 285 states and 382 transitions. Second operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 12 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-11 19:40:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:56,481 INFO L93 Difference]: Finished difference Result 360 states and 493 transitions. [2024-09-11 19:40:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 19:40:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 12 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2024-09-11 19:40:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:56,484 INFO L225 Difference]: With dead ends: 360 [2024-09-11 19:40:56,484 INFO L226 Difference]: Without dead ends: 358 [2024-09-11 19:40:56,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:40:56,485 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 32 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:56,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 625 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2024-09-11 19:40:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-09-11 19:40:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 305. [2024-09-11 19:40:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 165 states have internal predecessors, (186), 113 states have call successors, (113), 27 states have call predecessors, (113), 27 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2024-09-11 19:40:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 411 transitions. [2024-09-11 19:40:56,798 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 411 transitions. Word has length 138 [2024-09-11 19:40:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:56,798 INFO L474 AbstractCegarLoop]: Abstraction has 305 states and 411 transitions. [2024-09-11 19:40:56,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 12 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-11 19:40:56,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 411 transitions. [2024-09-11 19:40:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-09-11 19:40:56,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:56,800 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:56,814 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 19:40:57,004 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-11 19:40:57,005 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:57,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:57,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1468988412, now seen corresponding path program 9 times [2024-09-11 19:40:57,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:57,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042949872] [2024-09-11 19:40:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:57,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:40:57,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017570165] [2024-09-11 19:40:57,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:40:57,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:57,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:57,032 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) [2024-09-11 19:40:57,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 19:40:57,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:40:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:40:57,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-11 19:40:57,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:41:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 138 proven. 57 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2024-09-11 19:41:00,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:41:03,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:41:03,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042949872] [2024-09-11 19:41:03,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:41:03,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017570165] [2024-09-11 19:41:03,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017570165] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:41:03,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:41:03,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 19:41:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072178921] [2024-09-11 19:41:03,083 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:41:03,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:41:03,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:41:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:41:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:41:03,085 INFO L87 Difference]: Start difference. First operand 305 states and 411 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-11 19:41:04,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:41:04,411 INFO L93 Difference]: Finished difference Result 416 states and 573 transitions. [2024-09-11 19:41:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:41:04,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 160 [2024-09-11 19:41:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:41:04,415 INFO L225 Difference]: With dead ends: 416 [2024-09-11 19:41:04,415 INFO L226 Difference]: Without dead ends: 414 [2024-09-11 19:41:04,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:41:04,416 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:41:04,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 498 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:41:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2024-09-11 19:41:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 340. [2024-09-11 19:41:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 181 states have (on average 1.138121546961326) internal successors, (206), 182 states have internal predecessors, (206), 129 states have call successors, (129), 29 states have call predecessors, (129), 29 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-11 19:41:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 463 transitions. [2024-09-11 19:41:04,917 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 463 transitions. Word has length 160 [2024-09-11 19:41:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:41:04,917 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 463 transitions. [2024-09-11 19:41:04,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-11 19:41:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 463 transitions. [2024-09-11 19:41:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-09-11 19:41:04,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:41:04,919 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:41:04,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-11 19:41:05,120 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-11 19:41:05,120 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:41:05,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1153851998, now seen corresponding path program 10 times [2024-09-11 19:41:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:41:05,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709206117] [2024-09-11 19:41:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:41:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:41:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:41:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601327039] [2024-09-11 19:41:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:41:05,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:41:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:41:05,152 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) [2024-09-11 19:41:05,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 19:41:05,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:41:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:41:05,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-11 19:41:05,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:41:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 211 proven. 116 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-09-11 19:41:08,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:41:08,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:41:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709206117] [2024-09-11 19:41:08,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:41:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601327039] [2024-09-11 19:41:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601327039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:41:08,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:41:08,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-11 19:41:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205539554] [2024-09-11 19:41:08,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:41:08,931 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 19:41:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:41:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 19:41:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:41:08,932 INFO L87 Difference]: Start difference. First operand 340 states and 463 transitions. Second operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-11 19:41:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:41:16,037 INFO L93 Difference]: Finished difference Result 398 states and 547 transitions. [2024-09-11 19:41:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 19:41:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2024-09-11 19:41:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:41:16,039 INFO L225 Difference]: With dead ends: 398 [2024-09-11 19:41:16,039 INFO L226 Difference]: Without dead ends: 396 [2024-09-11 19:41:16,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 19:41:16,040 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 40 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:41:16,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 473 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-09-11 19:41:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-09-11 19:41:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 385. [2024-09-11 19:41:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 204 states have internal predecessors, (232), 149 states have call successors, (149), 32 states have call predecessors, (149), 32 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2024-09-11 19:41:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 529 transitions. [2024-09-11 19:41:16,479 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 529 transitions. Word has length 160 [2024-09-11 19:41:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:41:16,480 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 529 transitions. [2024-09-11 19:41:16,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-11 19:41:16,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 529 transitions. [2024-09-11 19:41:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-09-11 19:41:16,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:41:16,482 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:41:16,497 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-11 19:41:16,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:41:16,683 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:41:16,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:16,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2142944832, now seen corresponding path program 11 times [2024-09-11 19:41:16,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:41:16,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591841021] [2024-09-11 19:41:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:41:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:41:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:41:16,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103684466] [2024-09-11 19:41:16,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:41:16,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:41:16,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:41:16,707 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) [2024-09-11 19:41:16,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-11 19:41:17,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-11 19:41:17,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:41:17,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-11 19:41:17,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:41:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 111 proven. 93 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-09-11 19:41:18,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:41:18,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:41:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591841021] [2024-09-11 19:41:18,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:41:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103684466] [2024-09-11 19:41:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103684466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:41:18,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:41:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:41:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749360453] [2024-09-11 19:41:18,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:41:18,199 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:41:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:41:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:41:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:41:18,199 INFO L87 Difference]: Start difference. First operand 385 states and 529 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-11 19:41:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:41:19,702 INFO L93 Difference]: Finished difference Result 464 states and 648 transitions. [2024-09-11 19:41:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:41:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 160 [2024-09-11 19:41:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:41:19,706 INFO L225 Difference]: With dead ends: 464 [2024-09-11 19:41:19,706 INFO L226 Difference]: Without dead ends: 462 [2024-09-11 19:41:19,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:41:19,707 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:41:19,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 636 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:41:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-09-11 19:41:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 410. [2024-09-11 19:41:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 216 states have internal predecessors, (246), 161 states have call successors, (161), 33 states have call predecessors, (161), 33 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2024-09-11 19:41:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 567 transitions. [2024-09-11 19:41:20,296 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 567 transitions. Word has length 160 [2024-09-11 19:41:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:41:20,296 INFO L474 AbstractCegarLoop]: Abstraction has 410 states and 567 transitions. [2024-09-11 19:41:20,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-11 19:41:20,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 567 transitions. [2024-09-11 19:41:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-09-11 19:41:20,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:41:20,298 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:41:20,306 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-11 19:41:20,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-11 19:41:20,499 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:41:20,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1503607284, now seen corresponding path program 12 times [2024-09-11 19:41:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:41:20,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288212154] [2024-09-11 19:41:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:41:20,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:41:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:41:20,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393871214] [2024-09-11 19:41:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:41:20,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:41:20,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:41:20,540 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:41:20,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-11 19:41:20,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:41:20,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:41:20,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:41:20,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:41:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 179 proven. 84 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2024-09-11 19:41:21,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:41:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:41:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288212154] [2024-09-11 19:41:25,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:41:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393871214] [2024-09-11 19:41:25,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393871214] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:41:25,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:41:25,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:41:25,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588924347] [2024-09-11 19:41:25,567 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:41:25,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:41:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:41:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:41:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2024-09-11 19:41:25,568 INFO L87 Difference]: Start difference. First operand 410 states and 567 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:41:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:41:26,955 INFO L93 Difference]: Finished difference Result 486 states and 677 transitions. [2024-09-11 19:41:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:41:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 163 [2024-09-11 19:41:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:41:26,958 INFO L225 Difference]: With dead ends: 486 [2024-09-11 19:41:26,958 INFO L226 Difference]: Without dead ends: 484 [2024-09-11 19:41:26,959 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=207, Invalid=914, Unknown=1, NotChecked=0, Total=1122 [2024-09-11 19:41:26,959 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:41:26,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 360 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:41:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-11 19:41:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 445. [2024-09-11 19:41:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 232 states have (on average 1.146551724137931) internal successors, (266), 233 states have internal predecessors, (266), 177 states have call successors, (177), 35 states have call predecessors, (177), 35 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2024-09-11 19:41:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 619 transitions. [2024-09-11 19:41:27,506 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 619 transitions. Word has length 163 [2024-09-11 19:41:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:41:27,506 INFO L474 AbstractCegarLoop]: Abstraction has 445 states and 619 transitions. [2024-09-11 19:41:27,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:41:27,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 619 transitions. [2024-09-11 19:41:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-11 19:41:27,508 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:41:27,508 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:41:27,524 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-11 19:41:27,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-11 19:41:27,709 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:41:27,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:41:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1244352975, now seen corresponding path program 3 times [2024-09-11 19:41:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:41:27,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545265654] [2024-09-11 19:41:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:41:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:41:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:41:27,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603363365] [2024-09-11 19:41:27,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:41:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:41:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:41:27,744 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:41:27,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-11 19:41:27,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:41:27,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:41:27,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-11 19:41:27,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:41:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 237 proven. 88 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-11 19:41:36,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:41:45,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:41:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545265654] [2024-09-11 19:41:45,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:41:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603363365] [2024-09-11 19:41:45,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603363365] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:41:45,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:41:45,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 19:41:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779018864] [2024-09-11 19:41:45,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:41:45,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:41:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:41:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:41:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=739, Unknown=1, NotChecked=0, Total=870 [2024-09-11 19:41:45,610 INFO L87 Difference]: Start difference. First operand 445 states and 619 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-11 19:41:52,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:41:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:41:59,912 INFO L93 Difference]: Finished difference Result 549 states and 758 transitions. [2024-09-11 19:41:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 19:41:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 166 [2024-09-11 19:41:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:41:59,915 INFO L225 Difference]: With dead ends: 549 [2024-09-11 19:41:59,916 INFO L226 Difference]: Without dead ends: 546 [2024-09-11 19:41:59,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=206, Invalid=1125, Unknown=1, NotChecked=0, Total=1332 [2024-09-11 19:41:59,917 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:41:59,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 559 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2024-09-11 19:41:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2024-09-11 19:42:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 493. [2024-09-11 19:42:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 263 states have (on average 1.1330798479087452) internal successors, (298), 266 states have internal predecessors, (298), 187 states have call successors, (187), 42 states have call predecessors, (187), 42 states have return successors, (186), 184 states have call predecessors, (186), 186 states have call successors, (186) [2024-09-11 19:42:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 671 transitions. [2024-09-11 19:42:00,582 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 671 transitions. Word has length 166 [2024-09-11 19:42:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:00,583 INFO L474 AbstractCegarLoop]: Abstraction has 493 states and 671 transitions. [2024-09-11 19:42:00,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-11 19:42:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 671 transitions. [2024-09-11 19:42:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-09-11 19:42:00,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:00,585 INFO L216 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:00,597 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-11 19:42:00,785 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-11 19:42:00,785 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:00,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1228513835, now seen corresponding path program 13 times [2024-09-11 19:42:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757954801] [2024-09-11 19:42:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:00,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065087979] [2024-09-11 19:42:00,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:42:00,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:00,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:00,836 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:42:00,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-11 19:42:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:00,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-11 19:42:00,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 211 proven. 186 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2024-09-11 19:42:02,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757954801] [2024-09-11 19:42:03,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065087979] [2024-09-11 19:42:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065087979] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:03,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:42:03,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 19:42:03,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516643820] [2024-09-11 19:42:03,812 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:03,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:42:03,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:42:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:42:03,813 INFO L87 Difference]: Start difference. First operand 493 states and 671 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 21 states have internal predecessors, (41), 13 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2024-09-11 19:42:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:06,153 INFO L93 Difference]: Finished difference Result 575 states and 786 transitions. [2024-09-11 19:42:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:42:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 21 states have internal predecessors, (41), 13 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 180 [2024-09-11 19:42:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:06,157 INFO L225 Difference]: With dead ends: 575 [2024-09-11 19:42:06,157 INFO L226 Difference]: Without dead ends: 573 [2024-09-11 19:42:06,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:42:06,158 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 51 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:06,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 663 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:42:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-09-11 19:42:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 532. [2024-09-11 19:42:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 283 states have (on average 1.1342756183745584) internal successors, (321), 286 states have internal predecessors, (321), 203 states have call successors, (203), 45 states have call predecessors, (203), 45 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2024-09-11 19:42:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 726 transitions. [2024-09-11 19:42:06,835 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 726 transitions. Word has length 180 [2024-09-11 19:42:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:06,836 INFO L474 AbstractCegarLoop]: Abstraction has 532 states and 726 transitions. [2024-09-11 19:42:06,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 21 states have internal predecessors, (41), 13 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2024-09-11 19:42:06,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 726 transitions. [2024-09-11 19:42:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-11 19:42:06,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:06,838 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:06,858 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-11 19:42:07,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-11 19:42:07,039 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:07,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash -551824451, now seen corresponding path program 14 times [2024-09-11 19:42:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:07,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908464330] [2024-09-11 19:42:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:07,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411483937] [2024-09-11 19:42:07,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:42:07,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:07,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:07,070 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:42:07,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-11 19:42:07,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:42:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:07,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-11 19:42:07,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 254 proven. 203 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2024-09-11 19:42:16,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908464330] [2024-09-11 19:42:17,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411483937] [2024-09-11 19:42:17,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411483937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:17,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:42:17,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 19:42:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272902238] [2024-09-11 19:42:17,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:17,038 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:42:17,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:17,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:42:17,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=436, Unknown=1, NotChecked=0, Total=506 [2024-09-11 19:42:17,039 INFO L87 Difference]: Start difference. First operand 532 states and 726 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-11 19:42:22,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:42:29,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:42:34,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:42:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:36,082 INFO L93 Difference]: Finished difference Result 583 states and 798 transitions. [2024-09-11 19:42:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 19:42:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) Word has length 182 [2024-09-11 19:42:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:36,085 INFO L225 Difference]: With dead ends: 583 [2024-09-11 19:42:36,085 INFO L226 Difference]: Without dead ends: 581 [2024-09-11 19:42:36,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=128, Invalid=863, Unknown=1, NotChecked=0, Total=992 [2024-09-11 19:42:36,086 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 37 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 45 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:36,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 831 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 953 Invalid, 3 Unknown, 0 Unchecked, 16.7s Time] [2024-09-11 19:42:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-11 19:42:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 577. [2024-09-11 19:42:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 305 states have (on average 1.137704918032787) internal successors, (347), 308 states have internal predecessors, (347), 223 states have call successors, (223), 48 states have call predecessors, (223), 48 states have return successors, (222), 220 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-11 19:42:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 792 transitions. [2024-09-11 19:42:36,866 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 792 transitions. Word has length 182 [2024-09-11 19:42:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:36,867 INFO L474 AbstractCegarLoop]: Abstraction has 577 states and 792 transitions. [2024-09-11 19:42:36,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-11 19:42:36,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 792 transitions. [2024-09-11 19:42:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-11 19:42:36,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:36,879 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:36,896 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-11 19:42:37,079 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:37,080 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:37,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -866960865, now seen corresponding path program 15 times [2024-09-11 19:42:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336441234] [2024-09-11 19:42:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076830712] [2024-09-11 19:42:37,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:42:37,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:37,112 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:42:37,115 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-11 19:42:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:42:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:37,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-11 19:42:37,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 214 proven. 105 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2024-09-11 19:42:54,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336441234] [2024-09-11 19:43:05,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076830712] [2024-09-11 19:43:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076830712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:43:05,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:43:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-11 19:43:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737148280] [2024-09-11 19:43:05,850 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:05,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 19:43:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 19:43:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=571, Unknown=2, NotChecked=0, Total=702 [2024-09-11 19:43:05,851 INFO L87 Difference]: Start difference. First operand 577 states and 792 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19)