./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.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-scaling/hard2_valuebound5.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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --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 20:11:25,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:11:25,841 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:11:25,846 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:11:25,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:11:25,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:11:25,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:11:25,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:11:25,872 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:11:25,872 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:11:25,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:11:25,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:11:25,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:11:25,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:11:25,875 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:11:25,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:11:25,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:11:25,876 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:11:25,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:11:25,876 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:11:25,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:11:25,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:11:25,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:11:25,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:11:25,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:11:25,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:11:25,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:11:25,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:11:25,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:11:25,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:11:25,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:11:25,882 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:11:25,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:11:25,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:11:25,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:11:25,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:11:25,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:11:25,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:11:26,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:11:26,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:11:26,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:11:26,117 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:11:26,117 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:11:26,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2024-09-11 20:11:27,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:11:27,653 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:11:27,653 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2024-09-11 20:11:27,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9e2482fbe/71c39aee69434d0e9854fca4695e36a5/FLAG20d79110a [2024-09-11 20:11:27,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9e2482fbe/71c39aee69434d0e9854fca4695e36a5 [2024-09-11 20:11:27,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:11:27,672 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:11:27,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:11:27,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:11:27,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:11:27,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad41d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27, skipping insertion in model container [2024-09-11 20:11:27,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,723 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:11:27,890 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-scaling/hard2_valuebound5.c[526,539] [2024-09-11 20:11:27,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:11:27,910 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:11:27,919 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-scaling/hard2_valuebound5.c[526,539] [2024-09-11 20:11:27,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:11:27,935 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:11:27,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27 WrapperNode [2024-09-11 20:11:27,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:11:27,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:11:27,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:11:27,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:11:27,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,946 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,959 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-09-11 20:11:27,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:11:27,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:11:27,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:11:27,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:11:27,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,984 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-11 20:11:27,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,990 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:11:27,993 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:11:27,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:11:27,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:11:27,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (1/1) ... [2024-09-11 20:11:27,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:11:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:28,020 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 20:11:28,022 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 20:11:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:11:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:11:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:11:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:11:28,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:11:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:11:28,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:11:28,122 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:11:28,124 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:11:28,240 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-11 20:11:28,240 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:11:28,293 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:11:28,298 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:11:28,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:11:28 BoogieIcfgContainer [2024-09-11 20:11:28,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:11:28,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:11:28,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:11:28,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:11:28,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:11:27" (1/3) ... [2024-09-11 20:11:28,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c74740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:11:28, skipping insertion in model container [2024-09-11 20:11:28,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:11:27" (2/3) ... [2024-09-11 20:11:28,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c74740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:11:28, skipping insertion in model container [2024-09-11 20:11:28,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:11:28" (3/3) ... [2024-09-11 20:11:28,312 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2024-09-11 20:11:28,357 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:11:28,358 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:11:28,404 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:11:28,410 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;@2b2613f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:11:28,410 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:11:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 20:11:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:11:28,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:28,418 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:28,419 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:28,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2024-09-11 20:11:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:28,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826031628] [2024-09-11 20:11:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:11:28,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:28,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826031628] [2024-09-11 20:11:28,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826031628] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:28,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:11:28,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:11:28,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460222361] [2024-09-11 20:11:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:28,553 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:11:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:11:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:11:28,574 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:11:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:28,600 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2024-09-11 20:11:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:11:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 20:11:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:28,608 INFO L225 Difference]: With dead ends: 44 [2024-09-11 20:11:28,608 INFO L226 Difference]: Without dead ends: 21 [2024-09-11 20:11:28,610 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 20:11:28,613 INFO L434 NwaCegarLoop]: 29 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, 29 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 20:11:28,613 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-11 20:11:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-11 20:11:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:11:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2024-09-11 20:11:28,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2024-09-11 20:11:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:28,644 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2024-09-11 20:11:28,644 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:11:28,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-09-11 20:11:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:11:28,647 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:28,647 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:28,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:11:28,647 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:28,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2024-09-11 20:11:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:28,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733313056] [2024-09-11 20:11:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:11:28,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733313056] [2024-09-11 20:11:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733313056] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:28,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:11:28,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:11:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038587379] [2024-09-11 20:11:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:28,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:11:28,813 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:11:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:28,884 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-11 20:11:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:28,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 20:11:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:28,886 INFO L225 Difference]: With dead ends: 34 [2024-09-11 20:11:28,886 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 20:11:28,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 20:11:28,888 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:28,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 20:11:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-09-11 20:11:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:11:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-09-11 20:11:28,900 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2024-09-11 20:11:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:28,900 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-09-11 20:11:28,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:11:28,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-09-11 20:11:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 20:11:28,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:28,903 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:28,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:11:28,903 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:28,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2024-09-11 20:11:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168608007] [2024-09-11 20:11:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:29,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:11:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:11:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168608007] [2024-09-11 20:11:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168608007] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:29,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:11:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:11:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397831223] [2024-09-11 20:11:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:29,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:11:29,024 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:11:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:29,063 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-11 20:11:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:29,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-11 20:11:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:29,065 INFO L225 Difference]: With dead ends: 38 [2024-09-11 20:11:29,066 INFO L226 Difference]: Without dead ends: 36 [2024-09-11 20:11:29,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 20:11:29,067 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:29,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-11 20:11:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2024-09-11 20:11:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:11:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-11 20:11:29,075 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2024-09-11 20:11:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:29,075 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-11 20:11:29,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:11:29,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-11 20:11:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 20:11:29,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:29,076 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:29,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 20:11:29,077 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:29,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2024-09-11 20:11:29,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:29,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767993064] [2024-09-11 20:11:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:29,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341499404] [2024-09-11 20:11:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:29,099 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 20:11:29,100 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 20:11:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:29,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 20:11:29,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:11:29,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:11:29,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767993064] [2024-09-11 20:11:29,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341499404] [2024-09-11 20:11:29,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341499404] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:29,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:11:29,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:11:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616489085] [2024-09-11 20:11:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:29,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:11:29,208 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:11:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:29,261 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-11 20:11:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-11 20:11:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:29,263 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:11:29,263 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 20:11:29,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 20:11:29,264 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:29,264 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 20:11:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-11 20:11:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 20:11:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-09-11 20:11:29,277 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2024-09-11 20:11:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:29,278 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-09-11 20:11:29,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:11:29,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-09-11 20:11:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 20:11:29,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:29,279 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:29,292 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 20:11:29,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:29,480 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:29,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2024-09-11 20:11:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:29,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359799428] [2024-09-11 20:11:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:29,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:29,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859943837] [2024-09-11 20:11:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:29,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:29,493 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 20:11:29,494 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 20:11:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:29,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-11 20:11:29,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:11:29,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:11:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359799428] [2024-09-11 20:11:29,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859943837] [2024-09-11 20:11:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859943837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:11:29,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:11:29,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-11 20:11:29,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342394001] [2024-09-11 20:11:29,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:11:29,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:11:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:11:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:11:29,743 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:11:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:29,830 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-09-11 20:11:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:11:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-11 20:11:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:29,832 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:11:29,832 INFO L226 Difference]: Without dead ends: 53 [2024-09-11 20:11:29,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:11:29,833 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:29,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:11:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-11 20:11:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-09-11 20:11:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 20:11:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-09-11 20:11:29,841 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 25 [2024-09-11 20:11:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:29,842 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-09-11 20:11:29,842 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:11:29,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-09-11 20:11:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 20:11:29,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:29,843 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:29,858 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 20:11:30,043 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:30,044 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:30,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -447891575, now seen corresponding path program 1 times [2024-09-11 20:11:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:30,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459920922] [2024-09-11 20:11:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:30,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:30,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5842156] [2024-09-11 20:11:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:30,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:30,064 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 20:11:30,065 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 20:11:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:30,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-11 20:11:30,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:11:30,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 20:11:30,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459920922] [2024-09-11 20:11:30,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5842156] [2024-09-11 20:11:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5842156] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:11:30,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:11:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-11 20:11:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867915250] [2024-09-11 20:11:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:30,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:11:30,233 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:11:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:31,170 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2024-09-11 20:11:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:31,170 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-11 20:11:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:31,172 INFO L225 Difference]: With dead ends: 62 [2024-09-11 20:11:31,172 INFO L226 Difference]: Without dead ends: 60 [2024-09-11 20:11:31,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:11:31,173 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:31,173 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:11:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-11 20:11:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-11 20:11:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-11 20:11:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-11 20:11:31,183 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2024-09-11 20:11:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:31,184 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-11 20:11:31,184 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:11:31,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-11 20:11:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 20:11:31,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:31,185 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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 20:11:31,199 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:11:31,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 20:11:31,386 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:31,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1669992559, now seen corresponding path program 1 times [2024-09-11 20:11:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768465717] [2024-09-11 20:11:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:11:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:11:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:11:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:11:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:11:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-11 20:11:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 20:11:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768465717] [2024-09-11 20:11:31,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768465717] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:31,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:11:31,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:11:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581464711] [2024-09-11 20:11:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:31,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:11:31,471 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 20:11:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:31,505 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2024-09-11 20:11:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:31,506 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-09-11 20:11:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:31,507 INFO L225 Difference]: With dead ends: 67 [2024-09-11 20:11:31,507 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:11:31,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 20:11:31,508 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:31,508 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 92 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:11:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-11 20:11:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 20:11:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-11 20:11:31,516 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 41 [2024-09-11 20:11:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:31,517 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-11 20:11:31,517 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 20:11:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-11 20:11:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 20:11:31,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:31,518 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:31,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 20:11:31,518 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2024-09-11 20:11:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82039212] [2024-09-11 20:11:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091901893] [2024-09-11 20:11:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:31,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:31,538 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 20:11:31,539 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 20:11:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:31,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-11 20:11:31,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 20:11:31,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 20:11:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82039212] [2024-09-11 20:11:32,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091901893] [2024-09-11 20:11:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091901893] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:11:32,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:11:32,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-11 20:11:32,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36128325] [2024-09-11 20:11:32,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:11:32,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 20:11:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 20:11:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:11:32,838 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-11 20:11:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:33,312 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2024-09-11 20:11:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:11:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2024-09-11 20:11:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:33,314 INFO L225 Difference]: With dead ends: 130 [2024-09-11 20:11:33,314 INFO L226 Difference]: Without dead ends: 107 [2024-09-11 20:11:33,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:11:33,315 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:33,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 171 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:11:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-11 20:11:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-11 20:11:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 68 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-11 20:11:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2024-09-11 20:11:33,349 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 55 [2024-09-11 20:11:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:33,349 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2024-09-11 20:11:33,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-11 20:11:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2024-09-11 20:11:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 20:11:33,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:33,354 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:33,373 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:11:33,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:33,555 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:33,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2024-09-11 20:11:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:33,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719044181] [2024-09-11 20:11:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40500771] [2024-09-11 20:11:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:33,590 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 20:11:33,595 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 20:11:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:33,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-11 20:11:33,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 20:11:33,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 20:11:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719044181] [2024-09-11 20:11:34,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40500771] [2024-09-11 20:11:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40500771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:11:34,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:11:34,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-11 20:11:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634442617] [2024-09-11 20:11:34,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:11:34,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:11:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:11:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:11:34,215 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 20:11:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:34,779 INFO L93 Difference]: Finished difference Result 160 states and 213 transitions. [2024-09-11 20:11:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:11:34,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 66 [2024-09-11 20:11:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:34,784 INFO L225 Difference]: With dead ends: 160 [2024-09-11 20:11:34,784 INFO L226 Difference]: Without dead ends: 128 [2024-09-11 20:11:34,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:11:34,785 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:34,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 187 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:11:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-11 20:11:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2024-09-11 20:11:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 67 states have internal predecessors, (73), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-11 20:11:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2024-09-11 20:11:34,811 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 66 [2024-09-11 20:11:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:34,811 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2024-09-11 20:11:34,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 20:11:34,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2024-09-11 20:11:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-11 20:11:34,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:34,813 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:34,826 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:11:35,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:35,017 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:35,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1180146986, now seen corresponding path program 1 times [2024-09-11 20:11:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:35,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307565889] [2024-09-11 20:11:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:11:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:11:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:11:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:11:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:11:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:11:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 20:11:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 20:11:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 20:11:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-11 20:11:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-11 20:11:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 20:11:35,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307565889] [2024-09-11 20:11:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307565889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:11:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246954188] [2024-09-11 20:11:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:35,172 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 20:11:35,173 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 20:11:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 20:11:35,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-11 20:11:35,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:11:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246954188] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:11:35,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:11:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-11 20:11:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17737077] [2024-09-11 20:11:35,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:11:35,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:11:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:11:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:11:35,339 INFO L87 Difference]: Start difference. First operand 102 states and 128 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 20:11:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:35,409 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2024-09-11 20:11:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:11:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-11 20:11:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:35,411 INFO L225 Difference]: With dead ends: 139 [2024-09-11 20:11:35,411 INFO L226 Difference]: Without dead ends: 95 [2024-09-11 20:11:35,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:11:35,413 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:35,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:11:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-11 20:11:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-09-11 20:11:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 60 states have internal predecessors, (64), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 20:11:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2024-09-11 20:11:35,470 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 71 [2024-09-11 20:11:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:35,471 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2024-09-11 20:11:35,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 20:11:35,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2024-09-11 20:11:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-11 20:11:35,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:35,475 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:35,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 20:11:35,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 20:11:35,675 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:35,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2024-09-11 20:11:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903233449] [2024-09-11 20:11:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:11:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:11:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:11:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:11:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:11:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:11:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 20:11:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 20:11:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 20:11:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-11 20:11:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-11 20:11:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 20:11:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903233449] [2024-09-11 20:11:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903233449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:11:35,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272607281] [2024-09-11 20:11:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:35,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:35,989 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 20:11:35,990 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 20:11:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:11:36,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 20:11:36,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 20:11:36,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 20:11:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272607281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:11:36,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:11:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-11 20:11:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255598476] [2024-09-11 20:11:36,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:11:36,428 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:11:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:11:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:11:36,428 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-09-11 20:11:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:11:36,574 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2024-09-11 20:11:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:11:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 71 [2024-09-11 20:11:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:11:36,576 INFO L225 Difference]: With dead ends: 109 [2024-09-11 20:11:36,576 INFO L226 Difference]: Without dead ends: 78 [2024-09-11 20:11:36,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:11:36,576 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:11:36,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 239 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:11:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-11 20:11:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-11 20:11:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 20:11:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-09-11 20:11:36,595 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 71 [2024-09-11 20:11:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:11:36,596 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-09-11 20:11:36,596 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-09-11 20:11:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-09-11 20:11:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-11 20:11:36,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:11:36,597 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-11 20:11:36,614 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 20:11:36,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:36,798 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:11:36,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:11:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 2 times [2024-09-11 20:11:36,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:11:36,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054659858] [2024-09-11 20:11:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:11:36,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:11:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:11:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746966330] [2024-09-11 20:11:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:11:36,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:11:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:11:36,820 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 20:11:36,821 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 20:11:36,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:11:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:11:36,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 20:11:36,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:11:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-11 20:11:37,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:11:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-11 20:11:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:11:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054659858] [2024-09-11 20:11:46,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:11:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746966330] [2024-09-11 20:11:46,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746966330] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:11:46,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:11:46,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-11 20:11:46,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471683407] [2024-09-11 20:11:46,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:11:46,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:11:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:11:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:11:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:11:46,722 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-11 20:11:55,746 WARN L293 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:11:57,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:12:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:12:00,006 INFO L93 Difference]: Finished difference Result 156 states and 199 transitions. [2024-09-11 20:12:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:12:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 85 [2024-09-11 20:12:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:12:00,008 INFO L225 Difference]: With dead ends: 156 [2024-09-11 20:12:00,008 INFO L226 Difference]: Without dead ends: 137 [2024-09-11 20:12:00,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:12:00,010 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:12:00,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 306 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-11 20:12:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-11 20:12:00,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2024-09-11 20:12:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 87 states have internal predecessors, (93), 38 states have call successors, (38), 13 states have call predecessors, (38), 13 states have return successors, (37), 32 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-11 20:12:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2024-09-11 20:12:00,047 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 85 [2024-09-11 20:12:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:12:00,048 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2024-09-11 20:12:00,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-11 20:12:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2024-09-11 20:12:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-11 20:12:00,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:12:00,049 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:12:00,063 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:12:00,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:00,254 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:12:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1552559470, now seen corresponding path program 1 times [2024-09-11 20:12:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:12:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085487715] [2024-09-11 20:12:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:12:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:12:00,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731911396] [2024-09-11 20:12:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:00,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:12:00,276 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 20:12:00,278 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 20:12:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:00,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 20:12:00,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:12:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 20:12:00,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:12:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:12:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085487715] [2024-09-11 20:12:01,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:12:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731911396] [2024-09-11 20:12:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731911396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:12:01,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:12:01,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-11 20:12:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336212601] [2024-09-11 20:12:01,275 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:12:01,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:12:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:12:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:12:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:12:01,276 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-11 20:12:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:12:01,519 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2024-09-11 20:12:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:12:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 96 [2024-09-11 20:12:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:12:01,521 INFO L225 Difference]: With dead ends: 145 [2024-09-11 20:12:01,521 INFO L226 Difference]: Without dead ends: 143 [2024-09-11 20:12:01,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:12:01,522 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:12:01,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 310 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:12:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-11 20:12:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-09-11 20:12:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 94 states have internal predecessors, (99), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-11 20:12:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2024-09-11 20:12:01,583 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 96 [2024-09-11 20:12:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:12:01,584 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2024-09-11 20:12:01,584 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-11 20:12:01,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2024-09-11 20:12:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-11 20:12:01,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:12:01,585 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:12:01,597 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 20:12:01,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 20:12:01,788 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:12:01,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1154059924, now seen corresponding path program 2 times [2024-09-11 20:12:01,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:12:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121698361] [2024-09-11 20:12:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:12:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:12:01,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439845850] [2024-09-11 20:12:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:12:01,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:12:01,822 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 20:12:01,823 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 20:12:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:12:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:12:01,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 20:12:01,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:12:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 20:12:02,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:12:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 20:12:04,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:12:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121698361] [2024-09-11 20:12:04,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:12:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439845850] [2024-09-11 20:12:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439845850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:12:04,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:12:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-11 20:12:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732607717] [2024-09-11 20:12:04,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:12:04,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:12:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:12:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:12:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:12:04,937 INFO L87 Difference]: Start difference. First operand 142 states and 176 transitions. Second operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-11 20:12:08,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:12:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:12:08,318 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2024-09-11 20:12:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:12:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 96 [2024-09-11 20:12:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:12:08,320 INFO L225 Difference]: With dead ends: 194 [2024-09-11 20:12:08,320 INFO L226 Difference]: Without dead ends: 149 [2024-09-11 20:12:08,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:12:08,321 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:12:08,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 246 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-11 20:12:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-11 20:12:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 128. [2024-09-11 20:12:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 84 states have internal predecessors, (87), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-11 20:12:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 152 transitions. [2024-09-11 20:12:08,376 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 152 transitions. Word has length 96 [2024-09-11 20:12:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:12:08,376 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 152 transitions. [2024-09-11 20:12:08,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-11 20:12:08,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 152 transitions. [2024-09-11 20:12:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-11 20:12:08,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:12:08,378 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:12:08,390 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 20:12:08,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:12:08,582 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:12:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2060413457, now seen corresponding path program 1 times [2024-09-11 20:12:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:12:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709812904] [2024-09-11 20:12:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:12:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:12:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:12:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:12:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:12:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:12:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:12:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 20:12:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 20:12:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 20:12:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 20:12:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 20:12:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-11 20:12:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-11 20:12:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-11 20:12:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-11 20:12:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-11 20:12:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-11 20:12:08,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:12:08,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709812904] [2024-09-11 20:12:08,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709812904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:12:08,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119923871] [2024-09-11 20:12:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:08,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:12:08,884 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 20:12:08,885 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 20:12:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:08,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 20:12:08,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:12:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-11 20:12:09,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:12:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-11 20:12:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119923871] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:12:10,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:12:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 30 [2024-09-11 20:12:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594722203] [2024-09-11 20:12:10,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:12:10,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:12:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:12:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:12:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:12:10,696 INFO L87 Difference]: Start difference. First operand 128 states and 152 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-09-11 20:12:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:12:11,835 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2024-09-11 20:12:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:12:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) Word has length 101 [2024-09-11 20:12:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:12:11,839 INFO L225 Difference]: With dead ends: 188 [2024-09-11 20:12:11,839 INFO L226 Difference]: Without dead ends: 155 [2024-09-11 20:12:11,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 20:12:11,840 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:12:11,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 356 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:12:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-11 20:12:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2024-09-11 20:12:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 92 states have internal predecessors, (98), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-11 20:12:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2024-09-11 20:12:11,923 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 101 [2024-09-11 20:12:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:12:11,923 INFO L474 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2024-09-11 20:12:11,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-09-11 20:12:11,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2024-09-11 20:12:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-11 20:12:11,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:12:11,924 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:12:11,937 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 20:12:12,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:12:12,126 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:12:12,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2077808773, now seen corresponding path program 2 times [2024-09-11 20:12:12,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:12:12,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526335995] [2024-09-11 20:12:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:12:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:12:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:12:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:12:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:12:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:12:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:12:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 20:12:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 20:12:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 20:12:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 20:12:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 20:12:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-11 20:12:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-11 20:12:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-11 20:12:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-11 20:12:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-11 20:12:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-11 20:12:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-11 20:12:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 20:12:12,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:12:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526335995] [2024-09-11 20:12:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526335995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:12:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950874494] [2024-09-11 20:12:12,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:12:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:12:12,285 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 20:12:12,289 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 20:12:12,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:12:12,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:12:12,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 20:12:12,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:12:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 20:12:12,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:12:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 20:12:12,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950874494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:12:12,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:12:12,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-11 20:12:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936870192] [2024-09-11 20:12:12,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:12:12,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 20:12:12,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:12:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 20:12:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:12:12,493 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-11 20:12:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:12:12,621 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2024-09-11 20:12:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:12:12,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 113 [2024-09-11 20:12:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:12:12,623 INFO L225 Difference]: With dead ends: 155 [2024-09-11 20:12:12,623 INFO L226 Difference]: Without dead ends: 141 [2024-09-11 20:12:12,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:12:12,623 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:12:12,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:12:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-11 20:12:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2024-09-11 20:12:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 24 states have call successors, (24), 15 states have call predecessors, (24), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-11 20:12:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2024-09-11 20:12:12,662 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 113 [2024-09-11 20:12:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:12:12,663 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2024-09-11 20:12:12,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-11 20:12:12,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2024-09-11 20:12:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-11 20:12:12,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:12:12,664 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:12:12,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 20:12:12,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 20:12:12,864 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:12:12,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:12:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 395227745, now seen corresponding path program 1 times [2024-09-11 20:12:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:12:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536620630] [2024-09-11 20:12:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:12:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:12:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850548237] [2024-09-11 20:12:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:12:12,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:12:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:12:12,892 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 20:12:12,893 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 20:12:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:12:12,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-11 20:12:12,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:12:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-11 20:12:13,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:13:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-11 20:13:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:13:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536620630] [2024-09-11 20:13:35,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:13:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850548237] [2024-09-11 20:13:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850548237] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:13:35,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:13:35,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-09-11 20:13:35,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628594735] [2024-09-11 20:13:35,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:13:35,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 20:13:35,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:13:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 20:13:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2024-09-11 20:13:35,030 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2024-09-11 20:14:19,182 WARN L293 SmtUtils]: Spent 43.34s on a formula simplification. DAG size of input: 569 DAG size of output: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:14:21,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:14:23,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:14:26,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:14:29,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:14:39,078 WARN L293 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 179 DAG size of output: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:14:54,739 WARN L293 SmtUtils]: Spent 12.63s on a formula simplification. DAG size of input: 143 DAG size of output: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:15:07,101 WARN L293 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 176 DAG size of output: 85 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:15:10,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:15:17,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:15:22,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []