./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/cohencu-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a --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-ca4ee3d-m [2024-09-20 19:06:26,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:06:26,819 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:06:26,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:06:26,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:06:26,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:06:26,857 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:06:26,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:06:26,858 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:06:26,859 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:06:26,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:06:26,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:06:26,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:06:26,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:06:26,863 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:06:26,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:06:26,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:06:26,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:06:26,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:06:26,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:06:26,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:06:26,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:06:26,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:06:26,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:06:26,871 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:06:26,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:06:26,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:06:26,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:06:26,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:06:26,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:06:26,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:06:26,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:06:26,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:06:26,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:06:26,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:06:26,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:06:26,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:06:26,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:06:26,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:06:26,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:06:26,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:06:26,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:06:26,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:06:27,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:06:27,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:06:27,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:06:27,164 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:06:27,164 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:06:27,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2024-09-20 19:06:28,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:06:28,842 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:06:28,843 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2024-09-20 19:06:28,850 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0334bd819/af39227c6c044e3f8264f81c04d4b308/FLAGfa3fd4d90 [2024-09-20 19:06:28,865 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0334bd819/af39227c6c044e3f8264f81c04d4b308 [2024-09-20 19:06:28,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:06:28,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:06:28,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:06:28,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:06:28,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:06:28,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:06:28" (1/1) ... [2024-09-20 19:06:28,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262698ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:28, skipping insertion in model container [2024-09-20 19:06:28,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:06:28" (1/1) ... [2024-09-20 19:06:28,901 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:06:29,068 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/cohencu-ll_valuebound10.c[588,601] [2024-09-20 19:06:29,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:06:29,102 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:06:29,111 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/cohencu-ll_valuebound10.c[588,601] [2024-09-20 19:06:29,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:06:29,133 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:06:29,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29 WrapperNode [2024-09-20 19:06:29,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:06:29,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:06:29,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:06:29,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:06:29,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,156 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:06:29,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:06:29,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:06:29,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:06:29,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:06:29,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,168 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,189 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:06:29,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:06:29,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:06:29,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:06:29,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:06:29,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (1/1) ... [2024-09-20 19:06:29,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:06:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:29,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 19:06:29,242 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 19:06:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:06:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:06:29,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:06:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:06:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:06:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:06:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:06:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:06:29,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:06:29,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:06:29,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:06:29,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:06:29,363 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:06:29,366 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:06:29,574 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:06:29,574 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:06:29,599 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:06:29,600 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:06:29,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:29 BoogieIcfgContainer [2024-09-20 19:06:29,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:06:29,605 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:06:29,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:06:29,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:06:29,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:06:28" (1/3) ... [2024-09-20 19:06:29,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edfe69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:06:29, skipping insertion in model container [2024-09-20 19:06:29,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:29" (2/3) ... [2024-09-20 19:06:29,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edfe69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:06:29, skipping insertion in model container [2024-09-20 19:06:29,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:29" (3/3) ... [2024-09-20 19:06:29,615 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound10.c [2024-09-20 19:06:29,632 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:06:29,632 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:06:29,712 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:06:29,723 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;@7cba6f1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:06:29,723 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:06:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:06:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 19:06:29,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:29,742 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:29,743 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:29,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1802650881, now seen corresponding path program 1 times [2024-09-20 19:06:29,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:29,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887516889] [2024-09-20 19:06:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:29,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:29,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:29,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:06:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887516889] [2024-09-20 19:06:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887516889] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:29,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:06:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746597501] [2024-09-20 19:06:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:29,958 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:06:29,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:06:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:06:29,988 INFO L87 Difference]: Start difference. First operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:06:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:30,019 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2024-09-20 19:06:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:06:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 19:06:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:30,027 INFO L225 Difference]: With dead ends: 60 [2024-09-20 19:06:30,027 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:06:30,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:06:30,033 INFO L434 NwaCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:30,035 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:06:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:06:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:06:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:06:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-20 19:06:30,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 16 [2024-09-20 19:06:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:30,086 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-20 19:06:30,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:06:30,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-20 19:06:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 19:06:30,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:30,088 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:30,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:06:30,089 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:30,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1133972673, now seen corresponding path program 1 times [2024-09-20 19:06:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:30,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118110990] [2024-09-20 19:06:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:30,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:30,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:30,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:06:30,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:30,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118110990] [2024-09-20 19:06:30,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118110990] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:30,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:30,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:06:30,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414517284] [2024-09-20 19:06:30,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:30,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:06:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:06:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:06:30,435 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:06:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:30,580 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-09-20 19:06:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:06:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 19:06:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:30,583 INFO L225 Difference]: With dead ends: 36 [2024-09-20 19:06:30,585 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:06:30,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:30,586 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:30,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:06:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 19:06:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:06:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-20 19:06:30,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2024-09-20 19:06:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:30,608 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-20 19:06:30,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:06:30,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-20 19:06:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 19:06:30,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:30,610 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:30,611 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:06:30,611 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:30,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -295453008, now seen corresponding path program 1 times [2024-09-20 19:06:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:30,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300569342] [2024-09-20 19:06:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:30,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:30,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239454124] [2024-09-20 19:06:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:30,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:30,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:30,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:06:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:30,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:06:30,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:06:30,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:06:30,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300569342] [2024-09-20 19:06:30,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239454124] [2024-09-20 19:06:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239454124] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:30,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:30,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:06:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057955811] [2024-09-20 19:06:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:30,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:06:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:06:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:06:30,834 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:06:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:30,956 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-20 19:06:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:06:30,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 19:06:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:30,959 INFO L225 Difference]: With dead ends: 53 [2024-09-20 19:06:30,961 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:06:30,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:30,963 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:30,965 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:06:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-20 19:06:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:06:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-20 19:06:30,993 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2024-09-20 19:06:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:30,993 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-20 19:06:30,993 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:06:30,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-20 19:06:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 19:06:30,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:30,994 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:31,015 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:31,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:31,196 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:31,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 291539359, now seen corresponding path program 1 times [2024-09-20 19:06:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742792140] [2024-09-20 19:06:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:31,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480361257] [2024-09-20 19:06:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:31,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:06:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:31,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:06:31,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:31,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:06:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742792140] [2024-09-20 19:06:31,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480361257] [2024-09-20 19:06:31,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480361257] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:31,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:31,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:06:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220121031] [2024-09-20 19:06:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:31,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:06:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:06:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:06:31,348 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:06:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:31,430 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-09-20 19:06:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:06:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-20 19:06:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:31,432 INFO L225 Difference]: With dead ends: 57 [2024-09-20 19:06:31,433 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 19:06:31,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:31,434 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:31,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 19:06:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-20 19:06:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 19:06:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-20 19:06:31,453 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2024-09-20 19:06:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:31,453 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-20 19:06:31,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:06:31,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-20 19:06:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:06:31,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:31,455 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:31,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:31,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:31,656 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1228581936, now seen corresponding path program 1 times [2024-09-20 19:06:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091900678] [2024-09-20 19:06:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:31,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547042239] [2024-09-20 19:06:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:31,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:31,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:31,675 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:31,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:06:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:31,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:06:31,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:06:31,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:06:31,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:31,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091900678] [2024-09-20 19:06:31,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:31,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547042239] [2024-09-20 19:06:31,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547042239] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:31,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:31,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:06:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023269371] [2024-09-20 19:06:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:31,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:06:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:06:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:06:31,823 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:06:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:31,948 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-20 19:06:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:06:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-20 19:06:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:31,950 INFO L225 Difference]: With dead ends: 65 [2024-09-20 19:06:31,951 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 19:06:31,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:31,952 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:31,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 19:06:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 19:06:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:06:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-20 19:06:31,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2024-09-20 19:06:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:31,966 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-20 19:06:31,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:06:31,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-20 19:06:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 19:06:31,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:31,968 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-20 19:06:31,985 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:32,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:32,169 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:32,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash 149987423, now seen corresponding path program 1 times [2024-09-20 19:06:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:32,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019861741] [2024-09-20 19:06:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:32,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646237312] [2024-09-20 19:06:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:32,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:32,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:06:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:32,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 19:06:32,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:06:32,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:06:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:32,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019861741] [2024-09-20 19:06:32,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646237312] [2024-09-20 19:06:32,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646237312] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:32,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:32,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-20 19:06:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150746100] [2024-09-20 19:06:32,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:32,599 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 19:06:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 19:06:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:06:32,600 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-20 19:06:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:32,861 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-20 19:06:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:06:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2024-09-20 19:06:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:32,863 INFO L225 Difference]: With dead ends: 76 [2024-09-20 19:06:32,864 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 19:06:32,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:06:32,865 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:32,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:06:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 19:06:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-09-20 19:06:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:06:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-20 19:06:32,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 48 [2024-09-20 19:06:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:32,904 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-20 19:06:32,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-20 19:06:32,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-20 19:06:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:06:32,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:32,907 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:32,926 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:06:33,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:33,108 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:33,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash -883401392, now seen corresponding path program 2 times [2024-09-20 19:06:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974816800] [2024-09-20 19:06:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668384179] [2024-09-20 19:06:33,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:06:33,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:33,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:06:33,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:06:33,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:33,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 19:06:33,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:06:33,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:06:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974816800] [2024-09-20 19:06:33,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668384179] [2024-09-20 19:06:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668384179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:33,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2024-09-20 19:06:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962607146] [2024-09-20 19:06:33,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:33,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 19:06:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 19:06:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:06:33,563 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-20 19:06:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:33,918 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2024-09-20 19:06:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:06:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 53 [2024-09-20 19:06:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:33,921 INFO L225 Difference]: With dead ends: 90 [2024-09-20 19:06:33,921 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 19:06:33,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:06:33,924 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:33,926 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 265 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:06:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 19:06:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-09-20 19:06:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 19:06:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2024-09-20 19:06:33,964 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 53 [2024-09-20 19:06:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:33,964 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2024-09-20 19:06:33,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-20 19:06:33,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2024-09-20 19:06:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 19:06:33,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:33,966 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:33,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:06:34,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:06:34,171 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:34,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash -612037408, now seen corresponding path program 1 times [2024-09-20 19:06:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:34,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628137131] [2024-09-20 19:06:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988530648] [2024-09-20 19:06:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:34,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:34,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:34,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:34,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:06:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:34,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:06:34,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 19:06:34,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 19:06:34,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628137131] [2024-09-20 19:06:34,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:34,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988530648] [2024-09-20 19:06:34,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988530648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:34,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:34,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-20 19:06:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740683084] [2024-09-20 19:06:34,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:34,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:06:34,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:06:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:06:34,890 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 19:06:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:35,144 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2024-09-20 19:06:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:06:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 74 [2024-09-20 19:06:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:35,147 INFO L225 Difference]: With dead ends: 110 [2024-09-20 19:06:35,148 INFO L226 Difference]: Without dead ends: 108 [2024-09-20 19:06:35,149 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:06:35,149 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:35,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 170 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:06:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-20 19:06:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-09-20 19:06:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 57 states have internal predecessors, (58), 34 states have call successors, (34), 16 states have call predecessors, (34), 15 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-20 19:06:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2024-09-20 19:06:35,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 74 [2024-09-20 19:06:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:35,195 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2024-09-20 19:06:35,195 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 19:06:35,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2024-09-20 19:06:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:06:35,196 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:35,196 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:35,213 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:06:35,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:35,397 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:35,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1655042001, now seen corresponding path program 1 times [2024-09-20 19:06:35,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:35,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575439415] [2024-09-20 19:06:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626621169] [2024-09-20 19:06:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:35,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:35,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:35,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:35,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:06:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:35,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 19:06:35,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 19:06:35,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 19:06:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575439415] [2024-09-20 19:06:36,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:36,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626621169] [2024-09-20 19:06:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626621169] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:36,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:36,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-20 19:06:36,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907413150] [2024-09-20 19:06:36,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:36,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:06:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:06:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:06:36,028 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-20 19:06:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:36,475 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2024-09-20 19:06:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:06:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 79 [2024-09-20 19:06:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:36,477 INFO L225 Difference]: With dead ends: 122 [2024-09-20 19:06:36,477 INFO L226 Difference]: Without dead ends: 113 [2024-09-20 19:06:36,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:06:36,479 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:36,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 336 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:06:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-20 19:06:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2024-09-20 19:06:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 60 states have (on average 1.05) internal successors, (63), 62 states have internal predecessors, (63), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-20 19:06:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-09-20 19:06:36,522 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 79 [2024-09-20 19:06:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:36,523 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-09-20 19:06:36,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-20 19:06:36,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-09-20 19:06:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 19:06:36,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:36,525 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:36,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:06:36,725 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:36,725 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:36,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -875039120, now seen corresponding path program 3 times [2024-09-20 19:06:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:36,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132259093] [2024-09-20 19:06:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326697673] [2024-09-20 19:06:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:06:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:36,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:36,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:06:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:06:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:36,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:06:36,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 19:06:37,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 19:06:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132259093] [2024-09-20 19:06:37,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326697673] [2024-09-20 19:06:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326697673] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:37,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-20 19:06:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447825958] [2024-09-20 19:06:37,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:37,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:06:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:06:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:06:37,594 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:06:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:38,521 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2024-09-20 19:06:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:06:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 9 states have call successors, (28) Word has length 85 [2024-09-20 19:06:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:38,523 INFO L225 Difference]: With dead ends: 133 [2024-09-20 19:06:38,525 INFO L226 Difference]: Without dead ends: 115 [2024-09-20 19:06:38,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:06:38,526 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:38,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 271 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:06:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-20 19:06:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-20 19:06:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 27 states have call successors, (27), 20 states have call predecessors, (27), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 19:06:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2024-09-20 19:06:38,572 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 85 [2024-09-20 19:06:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:38,573 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2024-09-20 19:06:38,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:06:38,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2024-09-20 19:06:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-20 19:06:38,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:38,576 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:38,585 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:38,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:38,780 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835968, now seen corresponding path program 2 times [2024-09-20 19:06:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548212171] [2024-09-20 19:06:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:38,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814556868] [2024-09-20 19:06:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:06:38,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:38,840 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:38,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:06:38,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:06:38,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:38,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:06:38,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-20 19:06:39,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-20 19:06:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548212171] [2024-09-20 19:06:40,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814556868] [2024-09-20 19:06:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814556868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:40,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:40,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-20 19:06:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055468772] [2024-09-20 19:06:40,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:40,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:06:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:06:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:06:40,147 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-20 19:06:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:40,738 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2024-09-20 19:06:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:06:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 128 [2024-09-20 19:06:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:40,740 INFO L225 Difference]: With dead ends: 136 [2024-09-20 19:06:40,740 INFO L226 Difference]: Without dead ends: 134 [2024-09-20 19:06:40,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:06:40,741 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:40,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 299 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:06:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-20 19:06:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2024-09-20 19:06:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 27 states have call successors, (27), 21 states have call predecessors, (27), 20 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 19:06:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2024-09-20 19:06:40,775 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 128 [2024-09-20 19:06:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:40,776 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2024-09-20 19:06:40,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-20 19:06:40,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2024-09-20 19:06:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-20 19:06:40,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:40,779 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:40,795 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:06:40,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:06:40,983 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:40,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:40,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1340142287, now seen corresponding path program 2 times [2024-09-20 19:06:40,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:40,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184071598] [2024-09-20 19:06:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:41,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174020019] [2024-09-20 19:06:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:06:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:41,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:41,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:06:41,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:06:41,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:41,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:06:41,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-20 19:06:41,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-20 19:06:42,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184071598] [2024-09-20 19:06:42,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174020019] [2024-09-20 19:06:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174020019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:42,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-09-20 19:06:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992142885] [2024-09-20 19:06:42,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:42,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:06:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:06:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:06:42,339 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 14 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2024-09-20 19:06:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:43,161 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2024-09-20 19:06:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:06:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 14 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) Word has length 133 [2024-09-20 19:06:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:43,163 INFO L225 Difference]: With dead ends: 149 [2024-09-20 19:06:43,163 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 19:06:43,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2024-09-20 19:06:43,164 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:43,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 464 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:06:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 19:06:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2024-09-20 19:06:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 27 states have call successors, (27), 22 states have call predecessors, (27), 20 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 19:06:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2024-09-20 19:06:43,208 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 133 [2024-09-20 19:06:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:43,208 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2024-09-20 19:06:43,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 14 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2024-09-20 19:06:43,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2024-09-20 19:06:43,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-20 19:06:43,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:43,210 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:43,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 19:06:43,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 19:06:43,411 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:43,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash 127442784, now seen corresponding path program 1 times [2024-09-20 19:06:43,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:43,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546548276] [2024-09-20 19:06:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:43,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:43,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569623918] [2024-09-20 19:06:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:43,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:43,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:43,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:06:43,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:06:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:43,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 19:06:43,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 45 proven. 109 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-09-20 19:06:43,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 45 proven. 109 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-09-20 19:06:44,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546548276] [2024-09-20 19:06:44,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569623918] [2024-09-20 19:06:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569623918] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:44,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:44,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-09-20 19:06:44,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110176650] [2024-09-20 19:06:44,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:44,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:06:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:06:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:06:44,752 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (48), 9 states have call predecessors, (48), 10 states have call successors, (48) [2024-09-20 19:06:49,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:06:53,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:06:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:53,828 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2024-09-20 19:06:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:06:53,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (48), 9 states have call predecessors, (48), 10 states have call successors, (48) Word has length 138 [2024-09-20 19:06:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:53,829 INFO L225 Difference]: With dead ends: 134 [2024-09-20 19:06:53,829 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:06:53,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:06:53,831 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:53,831 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 348 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2024-09-20 19:06:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:06:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:06:53,831 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) [2024-09-20 19:06:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:06:53,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2024-09-20 19:06:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:53,832 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:06:53,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (48), 9 states have call predecessors, (48), 10 states have call successors, (48) [2024-09-20 19:06:53,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:06:53,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:06:53,836 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:06:53,850 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:54,037 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:54,040 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:54,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:07:15,147 WARN L293 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 192 DAG size of output: 62 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:07:38,098 WARN L293 SmtUtils]: Spent 22.94s on a formula simplification. DAG size of input: 193 DAG size of output: 54 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:08:00,498 WARN L293 SmtUtils]: Spent 22.38s on a formula simplification. DAG size of input: 193 DAG size of output: 54 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:08:16,599 WARN L293 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 193 DAG size of output: 54 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:08:23,849 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 176 DAG size of output: 43 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:08:51,259 WARN L293 SmtUtils]: Spent 27.41s on a formula simplification. DAG size of input: 206 DAG size of output: 63 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:09:16,578 WARN L293 SmtUtils]: Spent 25.32s on a formula simplification. DAG size of input: 175 DAG size of output: 55 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:09:26,684 WARN L293 SmtUtils]: Spent 9.98s on a formula simplification. DAG size of input: 206 DAG size of output: 63 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:09:41,053 WARN L293 SmtUtils]: Spent 14.37s on a formula simplification. DAG size of input: 177 DAG size of output: 56 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:10:09,370 WARN L293 SmtUtils]: Spent 28.30s on a formula simplification. DAG size of input: 175 DAG size of output: 55 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:10:35,314 WARN L293 SmtUtils]: Spent 25.91s on a formula simplification. DAG size of input: 193 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:10:35,323 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:10:35,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:10:35 BoogieIcfgContainer [2024-09-20 19:10:35,344 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:10:35,344 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:10:35,344 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:10:35,344 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:10:35,345 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:29" (3/4) ... [2024-09-20 19:10:35,346 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:10:35,394 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:10:35,395 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:10:35,395 INFO L158 Benchmark]: Toolchain (without parser) took 246526.81ms. Allocated memory was 142.6MB in the beginning and 239.1MB in the end (delta: 96.5MB). Free memory was 86.6MB in the beginning and 97.2MB in the end (delta: -10.7MB). Peak memory consumption was 87.0MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,395 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 77.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:10:35,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.76ms. Allocated memory is still 142.6MB. Free memory was 86.6MB in the beginning and 73.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,396 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.76ms. Allocated memory is still 142.6MB. Free memory was 73.6MB in the beginning and 72.7MB in the end (delta: 868.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,397 INFO L158 Benchmark]: Boogie Preprocessor took 42.99ms. Allocated memory is still 142.6MB. Free memory was 72.7MB in the beginning and 71.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:10:35,397 INFO L158 Benchmark]: RCFGBuilder took 399.97ms. Allocated memory was 142.6MB in the beginning and 199.2MB in the end (delta: 56.6MB). Free memory was 70.6MB in the beginning and 164.8MB in the end (delta: -94.2MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,398 INFO L158 Benchmark]: TraceAbstraction took 245738.27ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 164.5MB in the beginning and 99.3MB in the end (delta: 65.2MB). Peak memory consumption was 142.8MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,398 INFO L158 Benchmark]: Witness Printer took 50.66ms. Allocated memory is still 239.1MB. Free memory was 99.3MB in the beginning and 97.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:10:35,400 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 77.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.76ms. Allocated memory is still 142.6MB. Free memory was 86.6MB in the beginning and 73.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.76ms. Allocated memory is still 142.6MB. Free memory was 73.6MB in the beginning and 72.7MB in the end (delta: 868.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.99ms. Allocated memory is still 142.6MB. Free memory was 72.7MB in the beginning and 71.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 399.97ms. Allocated memory was 142.6MB in the beginning and 199.2MB in the end (delta: 56.6MB). Free memory was 70.6MB in the beginning and 164.8MB in the end (delta: -94.2MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * TraceAbstraction took 245738.27ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 164.5MB in the beginning and 99.3MB in the end (delta: 65.2MB). Peak memory consumption was 142.8MB. Max. memory is 16.1GB. * Witness Printer took 50.66ms. Allocated memory is still 239.1MB. Free memory was 99.3MB in the beginning and 97.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 17]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.4s, OverallIterations: 13, TraceHistogramMax: 24, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 154 SdHoareTripleChecker+Valid, 11.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 2817 SdHoareTripleChecker+Invalid, 11.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2343 mSDsCounter, 374 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2136 IncrementalHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 374 mSolverCounterUnsat, 474 mSDtfsCounter, 2136 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1438 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=12, InterpolantAutomatonStates: 115, 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, 13 MinimizatonAttempts, 81 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 1664 NumberOfCodeBlocks, 1624 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1565 ConstructedInterpolants, 0 QuantifiedInterpolants, 7574 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1799 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 7706/8248 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: 33]: Loop Invariant Derived loop invariant: ((((((((((((__int128) 7 * z) + ((__int128) y * 46)) + (((__int128) z * x) * 3)) + ((__int128) x * 36)) == ((((2 * ((__int128) y * y)) + (((__int128) z * z) * 2)) + 8) + ((__int128) z * y))) && ((((((__int128) x * 18) + (((__int128) z * x) * 3)) + ((__int128) y * 10)) + 10) == ((2 * ((__int128) y * y)) + ((__int128) z * 3)))) && ((((__int128) n * 6) + 6) == z)) && (0 <= a)) && (((((2 * ((__int128) y * y)) + (((__int128) z * z) * 5)) + 38) + (2 * ((__int128) z * y))) == (((((__int128) 23 * z) + (((__int128) z * x) * 3)) + ((__int128) x * 54)) + ((__int128) 94 * y)))) && ((n < (a + 1)) || (((__int128) z * x) == (((__int128) x * 12) + (((__int128) a * x) * 6))))) && (a <= 10)) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:10:35,438 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE