./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.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 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:11:22,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:11:22,462 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:11:22,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:11:22,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:11:22,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:11:22,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:11:22,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:11:22,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:11:22,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:11:22,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:11:22,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:11:22,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:11:22,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:11:22,503 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:11:22,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:11:22,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:11:22,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:11:22,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:11:22,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:11:22,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:11:22,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:11:22,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:11:22,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:11:22,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:11:22,509 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:11:22,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:11:22,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:11:22,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:11:22,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:11:22,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:11:22,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:11:22,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:11:22,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:11:22,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:11:22,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:11:22,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:11:22,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:11:22,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:11:22,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:11:22,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:11:22,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:11:22,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:11:22,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:11:22,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:11:22,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:11:22,832 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:11:22,833 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:11:22,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2024-09-12 16:11:24,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:11:24,470 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:11:24,470 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2024-09-12 16:11:24,476 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2d965abee/20835bc7d4da419191909c03d907ac4a/FLAG52974fac7 [2024-09-12 16:11:24,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2d965abee/20835bc7d4da419191909c03d907ac4a [2024-09-12 16:11:24,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:11:24,492 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:11:24,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:11:24,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:11:24,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:11:24,502 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f4a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24, skipping insertion in model container [2024-09-12 16:11:24,503 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,522 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:11:24,703 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2024-09-12 16:11:24,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:11:24,740 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:11:24,751 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2024-09-12 16:11:24,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:11:24,782 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:11:24,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24 WrapperNode [2024-09-12 16:11:24,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:11:24,785 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:11:24,785 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:11:24,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:11:24,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,804 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:11:24,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:11:24,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:11:24,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:11:24,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:11:24,815 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,833 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]. [2024-09-12 16:11:24,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,833 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,840 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:11:24,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:11:24,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:11:24,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:11:24,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (1/1) ... [2024-09-12 16:11:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:11:24,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:24,884 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) [2024-09-12 16:11:24,886 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 [2024-09-12 16:11:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:11:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:11:24,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:11:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:11:24,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:11:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:11:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:11:24,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:11:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:11:24,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:11:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:11:24,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:11:24,994 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:11:24,996 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:11:25,154 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 16:11:25,154 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:11:25,173 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:11:25,173 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 16:11:25,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:11:25 BoogieIcfgContainer [2024-09-12 16:11:25,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:11:25,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:11:25,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:11:25,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:11:25,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:11:24" (1/3) ... [2024-09-12 16:11:25,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194926d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:11:25, skipping insertion in model container [2024-09-12 16:11:25,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:11:24" (2/3) ... [2024-09-12 16:11:25,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194926d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:11:25, skipping insertion in model container [2024-09-12 16:11:25,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:11:25" (3/3) ... [2024-09-12 16:11:25,182 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2024-09-12 16:11:25,197 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:11:25,197 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:11:25,248 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:11:25,254 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;@4d97a5ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:11:25,255 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:11:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 16:11:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 16:11:25,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:25,265 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:25,266 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:25,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-12 16:11:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:25,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106086953] [2024-09-12 16:11:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:11:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106086953] [2024-09-12 16:11:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106086953] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:11:25,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:11:25,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 16:11:25,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690223912] [2024-09-12 16:11:25,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:25,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 16:11:25,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 16:11:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:11:25,524 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:11:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:25,572 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-12 16:11:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 16:11:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-12 16:11:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:25,592 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:11:25,592 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 16:11:25,597 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:11:25,602 INFO L434 NwaCegarLoop]: 44 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, 44 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 [2024-09-12 16:11:25,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:11:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 16:11:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 16:11:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:11:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-12 16:11:25,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-12 16:11:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:25,650 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-12 16:11:25,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:11:25,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-12 16:11:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 16:11:25,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:25,654 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:25,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:11:25,656 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:25,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:25,657 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-12 16:11:25,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:25,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345766547] [2024-09-12 16:11:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:25,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:11:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345766547] [2024-09-12 16:11:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345766547] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:11:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:11:25,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:11:25,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805297704] [2024-09-12 16:11:25,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:25,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:11:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:11:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:11:25,917 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 16:11:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:25,992 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-12 16:11:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:11:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-12 16:11:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:26,008 INFO L225 Difference]: With dead ends: 45 [2024-09-12 16:11:26,008 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 16:11:26,010 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:11:26,012 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:26,012 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:11:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 16:11:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-12 16:11:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:11:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-12 16:11:26,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-12 16:11:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:26,026 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-12 16:11:26,026 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 16:11:26,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-12 16:11:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 16:11:26,027 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:26,027 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:26,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 16:11:26,028 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:26,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-12 16:11:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353687954] [2024-09-12 16:11:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:11:26,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:26,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353687954] [2024-09-12 16:11:26,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353687954] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:11:26,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:11:26,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:11:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521158578] [2024-09-12 16:11:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:26,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:11:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:11:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:11:26,412 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2024-09-12 16:11:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:26,556 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-12 16:11:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:11:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 32 [2024-09-12 16:11:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:26,561 INFO L225 Difference]: With dead ends: 49 [2024-09-12 16:11:26,561 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 16:11:26,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:11:26,562 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:26,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:11:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 16:11:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-12 16:11:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:11:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-12 16:11:26,580 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-12 16:11:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:26,580 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-12 16:11:26,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2024-09-12 16:11:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-12 16:11:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 16:11:26,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:26,583 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:26,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 16:11:26,583 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:26,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-12 16:11:26,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648161993] [2024-09-12 16:11:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:26,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724110682] [2024-09-12 16:11:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:26,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:26,618 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) [2024-09-12 16:11:26,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:11:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:26,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 16:11:26,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 16:11:26,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:11:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:26,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648161993] [2024-09-12 16:11:26,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:26,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724110682] [2024-09-12 16:11:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724110682] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:11:26,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:11:26,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-12 16:11:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215497565] [2024-09-12 16:11:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:26,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 16:11:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 16:11:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-12 16:11:26,936 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 16:11:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:27,196 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-12 16:11:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:11:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-09-12 16:11:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:27,199 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:11:27,199 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 16:11:27,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-12 16:11:27,200 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:27,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:11:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 16:11:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-12 16:11:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 16:11:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-12 16:11:27,220 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-12 16:11:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:27,223 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-12 16:11:27,223 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 16:11:27,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-12 16:11:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 16:11:27,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:27,226 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:27,244 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:11:27,427 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:27,427 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-12 16:11:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513404531] [2024-09-12 16:11:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:27,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91620716] [2024-09-12 16:11:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:27,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:27,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:27,459 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) [2024-09-12 16:11:27,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:11:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:27,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 16:11:27,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:11:27,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 16:11:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513404531] [2024-09-12 16:11:28,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91620716] [2024-09-12 16:11:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91620716] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:28,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:11:28,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-09-12 16:11:28,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658050977] [2024-09-12 16:11:28,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:28,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:11:28,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:11:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-12 16:11:28,710 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-12 16:11:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:29,252 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-12 16:11:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:11:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2024-09-12 16:11:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:29,255 INFO L225 Difference]: With dead ends: 71 [2024-09-12 16:11:29,255 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 16:11:29,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:11:29,256 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:29,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 188 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 16:11:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 16:11:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-12 16:11:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 16:11:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-09-12 16:11:29,276 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 44 [2024-09-12 16:11:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:29,276 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-09-12 16:11:29,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-12 16:11:29,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-09-12 16:11:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 16:11:29,282 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:29,282 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:29,299 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:11:29,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:29,483 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:29,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-12 16:11:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:29,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449408638] [2024-09-12 16:11:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929632991] [2024-09-12 16:11:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:29,522 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) [2024-09-12 16:11:29,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:11:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:29,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 16:11:29,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 16:11:29,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 16:11:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449408638] [2024-09-12 16:11:29,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929632991] [2024-09-12 16:11:29,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929632991] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:29,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:11:29,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-09-12 16:11:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570457340] [2024-09-12 16:11:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:29,808 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 16:11:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:29,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 16:11:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:11:29,809 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:11:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:30,520 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-12 16:11:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:11:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2024-09-12 16:11:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:30,522 INFO L225 Difference]: With dead ends: 73 [2024-09-12 16:11:30,522 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 16:11:30,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-09-12 16:11:30,525 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:30,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 16:11:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 16:11:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-12 16:11:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 16:11:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-09-12 16:11:30,555 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 54 [2024-09-12 16:11:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:30,555 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-09-12 16:11:30,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:11:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-09-12 16:11:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 16:11:30,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:30,559 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:30,567 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 16:11:30,763 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 16:11:30,764 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:30,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -752924724, now seen corresponding path program 1 times [2024-09-12 16:11:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:30,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321574972] [2024-09-12 16:11:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:30,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-12 16:11:30,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321574972] [2024-09-12 16:11:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321574972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342576226] [2024-09-12 16:11:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:30,912 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) [2024-09-12 16:11:30,914 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:11:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:30,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 16:11:30,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 16:11:31,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342576226] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:31,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:11:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-09-12 16:11:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792220435] [2024-09-12 16:11:31,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:31,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 16:11:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 16:11:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:11:31,119 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-12 16:11:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:31,468 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2024-09-12 16:11:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:11:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 72 [2024-09-12 16:11:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:31,469 INFO L225 Difference]: With dead ends: 102 [2024-09-12 16:11:31,469 INFO L226 Difference]: Without dead ends: 94 [2024-09-12 16:11:31,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-12 16:11:31,470 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:31,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 16:11:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-12 16:11:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-09-12 16:11:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 16:11:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-12 16:11:31,503 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 72 [2024-09-12 16:11:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:31,504 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-12 16:11:31,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-12 16:11:31,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-12 16:11:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 16:11:31,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:31,509 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:31,527 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:11:31,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:31,710 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-12 16:11:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835620599] [2024-09-12 16:11:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053543454] [2024-09-12 16:11:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:31,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:31,769 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) [2024-09-12 16:11:31,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:11:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:31,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 16:11:31,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 54 proven. 23 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 16:11:33,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:12:04,566 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:12:16,851 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:12:32,865 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:12:44,944 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:12:48,953 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_main_~d~0 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse3 (div .cse2 2)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse4 (mod c_main_~p~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse2)) (< (mod c_main_~r~0 4294967296) .cse3) (= .cse4 1) (= .cse0 (mod (+ (* 4294967295 .cse3) c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse4 2))) 4294967296))))) is different from true [2024-09-12 16:13:01,070 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:13:17,102 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:13:45,583 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:13:53,594 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:14:09,608 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:14:27,149 WARN L293 SmtUtils]: Spent 17.54s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:14:35,344 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_main_~d~0 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse4 (div .cse2 2)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse5 (mod c_main_~p~0 4294967296)) (.cse3 (mod c_main_~r~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse2)) (< .cse3 .cse4) (= .cse5 1) (= .cse0 (mod (+ (* 4294967295 .cse4) c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse5 2))) 4294967296)) (< .cse2 (+ 1 .cse3))))) is different from true [2024-09-12 16:14:49,335 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:15:17,436 WARN L293 SmtUtils]: Spent 24.05s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:15:33,459 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:15:49,779 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)