./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.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 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:47:29,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:47:29,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:47:29,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:47:29,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:47:29,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:47:29,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:47:29,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:47:29,421 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:47:29,422 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:47:29,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:47:29,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:47:29,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:47:29,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:47:29,425 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:47:29,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:47:29,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:47:29,425 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:47:29,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:47:29,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:47:29,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:47:29,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:47:29,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:47:29,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:47:29,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:47:29,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:47:29,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:47:29,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:47:29,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:47:29,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:47:29,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:47:29,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:47:29,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:47:29,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:47:29,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:47:29,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:47:29,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:47:29,630 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:47:29,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2024-09-17 18:47:30,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:47:30,983 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:47:30,984 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2024-09-17 18:47:30,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0e3605093/fab1531ffec746c2b9fc647b4beb4a17/FLAGe1b8784e7 [2024-09-17 18:47:31,401 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0e3605093/fab1531ffec746c2b9fc647b4beb4a17 [2024-09-17 18:47:31,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:47:31,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:47:31,410 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:47:31,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:47:31,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:47:31,418 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556844f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31, skipping insertion in model container [2024-09-17 18:47:31,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:47:31,541 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2024-09-17 18:47:31,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:47:31,571 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:47:31,580 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2024-09-17 18:47:31,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:47:31,605 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:47:31,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31 WrapperNode [2024-09-17 18:47:31,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:47:31,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:47:31,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:47:31,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:47:31,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,621 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:47:31,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:47:31,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:47:31,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:47:31,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:47:31,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,631 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,640 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-17 18:47:31,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:47:31,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:47:31,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:47:31,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:47:31,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (1/1) ... [2024-09-17 18:47:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:47:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:31,686 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) [2024-09-17 18:47:31,689 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 [2024-09-17 18:47:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:47:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:47:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:47:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:47:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:47:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:47:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:47:31,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:47:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:47:31,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:47:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:47:31,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:47:31,776 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:47:31,778 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:47:31,926 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-17 18:47:31,926 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:47:31,940 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:47:31,940 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-17 18:47:31,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:47:31 BoogieIcfgContainer [2024-09-17 18:47:31,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:47:31,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:47:31,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:47:31,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:47:31,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:47:31" (1/3) ... [2024-09-17 18:47:31,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714fca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:47:31, skipping insertion in model container [2024-09-17 18:47:31,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:47:31" (2/3) ... [2024-09-17 18:47:31,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714fca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:47:31, skipping insertion in model container [2024-09-17 18:47:31,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:47:31" (3/3) ... [2024-09-17 18:47:31,947 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2024-09-17 18:47:31,959 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:47:31,959 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:47:31,998 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:47:32,003 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;@5e8051d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:47:32,003 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:47:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:47:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:47:32,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:32,012 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:32,013 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:32,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-17 18:47:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948153181] [2024-09-17 18:47:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:47:32,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:32,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948153181] [2024-09-17 18:47:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948153181] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:32,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:32,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:47:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964937918] [2024-09-17 18:47:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:32,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:47:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:47:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:47:32,222 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:47:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:32,254 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-17 18:47:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:47:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-17 18:47:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:32,262 INFO L225 Difference]: With dead ends: 70 [2024-09-17 18:47:32,262 INFO L226 Difference]: Without dead ends: 34 [2024-09-17 18:47:32,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:47:32,267 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:32,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-17 18:47:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-17 18:47:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:47:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-17 18:47:32,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-17 18:47:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:32,303 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-17 18:47:32,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:47:32,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-17 18:47:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 18:47:32,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:32,308 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:32,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:47:32,308 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:32,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-17 18:47:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009644347] [2024-09-17 18:47:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:47:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009644347] [2024-09-17 18:47:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009644347] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:47:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564194551] [2024-09-17 18:47:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:32,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:47:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:47:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:32,489 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:47:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:32,617 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-17 18:47:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:47:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-17 18:47:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:32,620 INFO L225 Difference]: With dead ends: 53 [2024-09-17 18:47:32,620 INFO L226 Difference]: Without dead ends: 46 [2024-09-17 18:47:32,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:32,622 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:32,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:47:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-17 18:47:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-17 18:47:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:47:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-17 18:47:32,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-17 18:47:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:32,633 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-17 18:47:32,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:47:32,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-17 18:47:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 18:47:32,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:32,634 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:32,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:47:32,635 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:32,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-17 18:47:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:32,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627879424] [2024-09-17 18:47:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776863098] [2024-09-17 18:47:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:32,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:32,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:32,653 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) [2024-09-17 18:47:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:47:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:32,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:47:32,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:47:32,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:47:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:32,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627879424] [2024-09-17 18:47:32,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776863098] [2024-09-17 18:47:32,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776863098] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:32,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:32,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:47:32,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010564050] [2024-09-17 18:47:32,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:32,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:47:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:47:32,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:47:32,805 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:47:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:32,862 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-17 18:47:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:47:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-17 18:47:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:32,865 INFO L225 Difference]: With dead ends: 52 [2024-09-17 18:47:32,866 INFO L226 Difference]: Without dead ends: 50 [2024-09-17 18:47:32,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:32,867 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:32,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-17 18:47:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-17 18:47:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:47:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-17 18:47:32,885 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-17 18:47:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:32,886 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-17 18:47:32,886 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:47:32,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-17 18:47:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-17 18:47:32,887 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:32,887 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:32,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:47:33,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:33,088 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:33,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-17 18:47:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:33,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904628978] [2024-09-17 18:47:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:33,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:47:33,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904628978] [2024-09-17 18:47:33,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904628978] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248735219] [2024-09-17 18:47:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:33,240 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) [2024-09-17 18:47:33,242 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:47:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:47:33,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:47:33,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:47:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248735219] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:47:33,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:47:33,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-17 18:47:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068373369] [2024-09-17 18:47:33,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:33,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:47:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:47:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:47:33,408 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:47:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:33,578 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-17 18:47:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:47:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-17 18:47:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:33,579 INFO L225 Difference]: With dead ends: 102 [2024-09-17 18:47:33,579 INFO L226 Difference]: Without dead ends: 95 [2024-09-17 18:47:33,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:47:33,580 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:33,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:47:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-17 18:47:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-17 18:47:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:47:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-17 18:47:33,593 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-17 18:47:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:33,593 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-17 18:47:33,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:47:33,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-17 18:47:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:47:33,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:33,594 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:33,606 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:47:33,795 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:33,795 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:33,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-17 18:47:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:33,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721771451] [2024-09-17 18:47:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:33,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835746302] [2024-09-17 18:47:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:33,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:33,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:33,820 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) [2024-09-17 18:47:33,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:47:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:33,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:47:33,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:47:33,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:47:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721771451] [2024-09-17 18:47:33,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835746302] [2024-09-17 18:47:33,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835746302] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:33,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:33,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:47:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930289660] [2024-09-17 18:47:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:33,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:47:33,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:47:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:47:33,913 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:47:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:33,984 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-17 18:47:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:47:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-17 18:47:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:33,987 INFO L225 Difference]: With dead ends: 78 [2024-09-17 18:47:33,987 INFO L226 Difference]: Without dead ends: 76 [2024-09-17 18:47:33,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:33,989 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:33,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-17 18:47:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-17 18:47:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:47:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-17 18:47:34,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-17 18:47:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:34,013 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-17 18:47:34,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:47:34,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-17 18:47:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:47:34,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:34,014 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 18:47:34,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:34,215 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:34,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-17 18:47:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755699108] [2024-09-17 18:47:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:47:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755699108] [2024-09-17 18:47:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755699108] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344031876] [2024-09-17 18:47:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:34,388 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) [2024-09-17 18:47:34,392 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:47:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:34,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-17 18:47:34,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:47:34,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:47:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344031876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:47:34,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:47:34,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2024-09-17 18:47:34,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810822074] [2024-09-17 18:47:34,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:34,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:47:34,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:47:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:47:34,722 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-17 18:47:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:34,979 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2024-09-17 18:47:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:47:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 41 [2024-09-17 18:47:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:34,981 INFO L225 Difference]: With dead ends: 101 [2024-09-17 18:47:34,981 INFO L226 Difference]: Without dead ends: 63 [2024-09-17 18:47:34,981 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:47:34,982 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:34,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 333 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:47:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-17 18:47:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2024-09-17 18:47:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:47:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-17 18:47:34,996 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 41 [2024-09-17 18:47:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:34,996 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-17 18:47:34,996 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-17 18:47:34,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-17 18:47:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-17 18:47:34,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:34,999 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:35,031 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:47:35,200 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:35,201 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:35,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-17 18:47:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310209825] [2024-09-17 18:47:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:35,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445106933] [2024-09-17 18:47:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:35,222 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) [2024-09-17 18:47:35,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:47:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:35,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:47:35,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-17 18:47:35,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:47:35,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:35,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310209825] [2024-09-17 18:47:35,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:35,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445106933] [2024-09-17 18:47:35,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445106933] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:35,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:35,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:47:35,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274426808] [2024-09-17 18:47:35,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:35,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:47:35,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:47:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:47:35,311 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:47:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:35,360 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-17 18:47:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:47:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-17 18:47:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:35,361 INFO L225 Difference]: With dead ends: 78 [2024-09-17 18:47:35,361 INFO L226 Difference]: Without dead ends: 76 [2024-09-17 18:47:35,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:35,362 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:35,364 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-17 18:47:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2024-09-17 18:47:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-17 18:47:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2024-09-17 18:47:35,376 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 46 [2024-09-17 18:47:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:35,377 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2024-09-17 18:47:35,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:47:35,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2024-09-17 18:47:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 18:47:35,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:35,378 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:35,392 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:47:35,578 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 18:47:35,579 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:35,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:35,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-17 18:47:35,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:35,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80938806] [2024-09-17 18:47:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:35,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757161172] [2024-09-17 18:47:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:35,593 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) [2024-09-17 18:47:35,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:47:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:35,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:47:35,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:47:35,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:47:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80938806] [2024-09-17 18:47:35,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757161172] [2024-09-17 18:47:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757161172] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:35,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:35,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:47:35,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169269410] [2024-09-17 18:47:35,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:35,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:47:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:35,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:47:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:47:35,655 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:47:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:35,698 INFO L93 Difference]: Finished difference Result 105 states and 147 transitions. [2024-09-17 18:47:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:47:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-17 18:47:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:35,700 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:47:35,700 INFO L226 Difference]: Without dead ends: 103 [2024-09-17 18:47:35,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:35,701 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:35,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-17 18:47:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2024-09-17 18:47:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-17 18:47:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 135 transitions. [2024-09-17 18:47:35,717 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 135 transitions. Word has length 51 [2024-09-17 18:47:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:35,717 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 135 transitions. [2024-09-17 18:47:35,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:47:35,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 135 transitions. [2024-09-17 18:47:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 18:47:35,718 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:35,719 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:35,732 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:47:35,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:35,919 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:35,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-17 18:47:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:35,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107559318] [2024-09-17 18:47:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:35,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698019181] [2024-09-17 18:47:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:35,948 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) [2024-09-17 18:47:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:47:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:35,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-17 18:47:35,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:47:36,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-17 18:47:38,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:38,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107559318] [2024-09-17 18:47:38,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:38,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698019181] [2024-09-17 18:47:38,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698019181] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:47:38,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:47:38,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-17 18:47:38,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602196246] [2024-09-17 18:47:38,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:38,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:47:38,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:47:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:47:38,083 INFO L87 Difference]: Start difference. First operand 97 states and 135 transitions. Second operand has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-17 18:47:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:41,236 INFO L93 Difference]: Finished difference Result 330 states and 509 transitions. [2024-09-17 18:47:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-17 18:47:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2024-09-17 18:47:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:41,240 INFO L225 Difference]: With dead ends: 330 [2024-09-17 18:47:41,240 INFO L226 Difference]: Without dead ends: 326 [2024-09-17 18:47:41,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=728, Invalid=2694, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:47:41,242 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 298 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:41,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 545 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 18:47:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-09-17 18:47:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 188. [2024-09-17 18:47:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 111 states have internal predecessors, (131), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 65 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-17 18:47:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 271 transitions. [2024-09-17 18:47:41,374 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 271 transitions. Word has length 63 [2024-09-17 18:47:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:41,376 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 271 transitions. [2024-09-17 18:47:41,376 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-17 18:47:41,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 271 transitions. [2024-09-17 18:47:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-17 18:47:41,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:41,379 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:41,390 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 18:47:41,579 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:41,580 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:41,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-17 18:47:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:41,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776148603] [2024-09-17 18:47:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:47:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:47:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:47:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:47:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:47:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:47:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:47:41,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776148603] [2024-09-17 18:47:41,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776148603] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:47:41,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:47:41,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:47:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548183638] [2024-09-17 18:47:41,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:47:41,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:47:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:47:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:47:41,670 INFO L87 Difference]: Start difference. First operand 188 states and 271 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 18:47:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:41,754 INFO L93 Difference]: Finished difference Result 309 states and 443 transitions. [2024-09-17 18:47:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:47:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-17 18:47:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:41,756 INFO L225 Difference]: With dead ends: 309 [2024-09-17 18:47:41,756 INFO L226 Difference]: Without dead ends: 185 [2024-09-17 18:47:41,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:47:41,758 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:41,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:47:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-09-17 18:47:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2024-09-17 18:47:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 110 states have internal predecessors, (133), 63 states have call successors, (63), 10 states have call predecessors, (63), 9 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-17 18:47:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 257 transitions. [2024-09-17 18:47:41,841 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 257 transitions. Word has length 71 [2024-09-17 18:47:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:41,841 INFO L474 AbstractCegarLoop]: Abstraction has 182 states and 257 transitions. [2024-09-17 18:47:41,842 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 18:47:41,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 257 transitions. [2024-09-17 18:47:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 18:47:41,842 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:41,843 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:41,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-17 18:47:41,843 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:41,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:41,843 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-17 18:47:41,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:41,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915256604] [2024-09-17 18:47:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:41,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:47:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:47:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:47:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:47:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:47:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:47:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:47:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-17 18:47:41,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915256604] [2024-09-17 18:47:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915256604] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:41,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696325501] [2024-09-17 18:47:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:41,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:41,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:41,994 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) [2024-09-17 18:47:41,996 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:47:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:47:42,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-17 18:47:42,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-17 18:47:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696325501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:47:42,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:47:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-17 18:47:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444734190] [2024-09-17 18:47:42,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:42,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:47:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:47:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:47:42,230 INFO L87 Difference]: Start difference. First operand 182 states and 257 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-17 18:47:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:42,390 INFO L93 Difference]: Finished difference Result 267 states and 366 transitions. [2024-09-17 18:47:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:47:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 73 [2024-09-17 18:47:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:42,392 INFO L225 Difference]: With dead ends: 267 [2024-09-17 18:47:42,392 INFO L226 Difference]: Without dead ends: 152 [2024-09-17 18:47:42,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:47:42,393 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:42,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 298 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:47:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-17 18:47:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-09-17 18:47:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 96 states have internal predecessors, (112), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-17 18:47:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 204 transitions. [2024-09-17 18:47:42,453 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 204 transitions. Word has length 73 [2024-09-17 18:47:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:42,453 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 204 transitions. [2024-09-17 18:47:42,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-17 18:47:42,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 204 transitions. [2024-09-17 18:47:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-17 18:47:42,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:42,454 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:42,466 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:47:42,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:42,658 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-17 18:47:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554974457] [2024-09-17 18:47:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:47:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:47:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:47:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:47:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:47:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:47:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:47:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:47:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:47:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:47:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-17 18:47:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554974457] [2024-09-17 18:47:42,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554974457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534432175] [2024-09-17 18:47:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:42,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:42,850 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) [2024-09-17 18:47:42,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:47:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:42,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:47:42,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-17 18:47:42,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-17 18:47:43,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534432175] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:47:43,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:47:43,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-17 18:47:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527363270] [2024-09-17 18:47:43,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:43,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 18:47:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 18:47:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:47:43,050 INFO L87 Difference]: Start difference. First operand 152 states and 204 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:47:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:43,156 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2024-09-17 18:47:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 18:47:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2024-09-17 18:47:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:43,157 INFO L225 Difference]: With dead ends: 156 [2024-09-17 18:47:43,157 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 18:47:43,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:47:43,158 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:43,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 208 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:47:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 18:47:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 18:47:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 18:47:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 18:47:43,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2024-09-17 18:47:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:43,159 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 18:47:43,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:47:43,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 18:47:43,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 18:47:43,161 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 18:47:43,182 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:47:43,362 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 18:47:43,365 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:43,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 18:47:43,974 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 18:47:43,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 06:47:43 BoogieIcfgContainer [2024-09-17 18:47:43,987 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 18:47:43,987 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 18:47:43,987 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 18:47:43,988 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 18:47:43,988 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:47:31" (3/4) ... [2024-09-17 18:47:43,989 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 18:47:44,026 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 18:47:44,027 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 18:47:44,027 INFO L158 Benchmark]: Toolchain (without parser) took 12623.54ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 134.1MB in the beginning and 177.4MB in the end (delta: -43.3MB). Peak memory consumption was 71.0MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,027 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 132.1MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 18:47:44,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.30ms. Allocated memory is still 203.4MB. Free memory was 133.5MB in the beginning and 121.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.75ms. Allocated memory is still 203.4MB. Free memory was 121.8MB in the beginning and 121.0MB in the end (delta: 866.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,028 INFO L158 Benchmark]: Boogie Preprocessor took 26.01ms. Allocated memory is still 203.4MB. Free memory was 121.0MB in the beginning and 118.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,028 INFO L158 Benchmark]: RCFGBuilder took 292.14ms. Allocated memory is still 203.4MB. Free memory was 118.9MB in the beginning and 104.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,028 INFO L158 Benchmark]: TraceAbstraction took 12044.94ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 103.6MB in the beginning and 180.5MB in the end (delta: -77.0MB). Peak memory consumption was 113.0MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,028 INFO L158 Benchmark]: Witness Printer took 39.49ms. Allocated memory is still 314.6MB. Free memory was 180.5MB in the beginning and 177.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-17 18:47:44,029 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 132.1MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.30ms. Allocated memory is still 203.4MB. Free memory was 133.5MB in the beginning and 121.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.75ms. Allocated memory is still 203.4MB. Free memory was 121.8MB in the beginning and 121.0MB in the end (delta: 866.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.01ms. Allocated memory is still 203.4MB. Free memory was 121.0MB in the beginning and 118.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.14ms. Allocated memory is still 203.4MB. Free memory was 118.9MB in the beginning and 104.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 12044.94ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 103.6MB in the beginning and 180.5MB in the end (delta: -77.0MB). Peak memory consumption was 113.0MB. Max. memory is 16.1GB. * Witness Printer took 39.49ms. Allocated memory is still 314.6MB. Free memory was 180.5MB in the beginning and 177.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.4s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 556 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 526 mSDsluCounter, 2458 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2021 mSDsCounter, 311 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1516 IncrementalHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 311 mSolverCounterUnsat, 437 mSDtfsCounter, 1516 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 952 GetRequests, 792 SyntacticMatches, 9 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=9, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 196 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1056 NumberOfCodeBlocks, 1056 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1084 ConstructedInterpolants, 0 QuantifiedInterpolants, 3473 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1206 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 1087/1192 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((a == 1) && (r == 0)) && (y == 1)) && (k == 0)) && (s == 1)) && (v == 1)) && (b == y)) && (d == 1)) && (q == 0)) && (a == x)) && (c == x)) && (p == 1)) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((a == 1) && (b == 0)) && (p == 0)) && (y == 1)) && (r == 1)) && (x == 1)) && (q == 1)) && (((__int128) s + 1) == 0)) || ((((((((a == 1) && (r == 0)) && (b == 1)) && (y == 1)) && (s == 1)) && (x == 1)) && (q == 0)) && (p == 1))) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((a == 1) && (r == 0)) && (b == 1)) && (y == 1)) && (s == 1)) && (x == 1)) && (k == 1)) && (q == 0)) && (c == 0)) && (p == 1)) || ((((((((((a == 1) && (r == 0)) && (b == 1)) && (y == 1)) && (k == 0)) && (s == 1)) && (x == 1)) && (q == 0)) && (c == 1)) && (p == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-17 18:47:44,046 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE