./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:44:29,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:44:29,720 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:44:29,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:44:29,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:44:29,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:44:29,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:44:29,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:44:29,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:44:29,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:44:29,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:44:29,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:44:29,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:44:29,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:44:29,763 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:44:29,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:44:29,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:44:29,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:44:29,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:44:29,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:44:29,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:44:29,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:44:29,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:44:29,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:44:29,777 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:44:29,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:44:29,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:44:29,778 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:44:29,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:44:29,778 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:44:29,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:44:29,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:44:29,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:44:29,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:44:29,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:44:29,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:44:29,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:44:29,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:44:29,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:44:29,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:44:29,782 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:44:29,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:44:29,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:44:30,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:44:30,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:44:30,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:44:30,031 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:44:30,032 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:44:30,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-09-20 19:44:31,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:44:31,539 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:44:31,540 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-09-20 19:44:31,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/cbd9429c7/afa24ee30f7d4d968935f3550b7bb0ac/FLAGd1e120147 [2024-09-20 19:44:31,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/cbd9429c7/afa24ee30f7d4d968935f3550b7bb0ac [2024-09-20 19:44:31,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:44:31,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:44:31,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:44:31,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:44:31,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:44:31,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1020e403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31, skipping insertion in model container [2024-09-20 19:44:31,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:44:31,731 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2024-09-20 19:44:31,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:44:31,757 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:44:31,767 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2024-09-20 19:44:31,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:44:31,786 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:44:31,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31 WrapperNode [2024-09-20 19:44:31,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:44:31,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:44:31,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:44:31,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:44:31,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,804 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:44:31,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:44:31,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:44:31,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:44:31,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:44:31,815 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,826 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:44:31,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:44:31,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:44:31,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:44:31,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:44:31,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (1/1) ... [2024-09-20 19:44:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:44:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:31,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 19:44:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 19:44:31,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:44:31,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:44:31,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:44:31,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:44:31,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:44:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:44:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:44:31,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:44:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:44:31,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:44:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:44:31,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:44:31,960 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:44:31,962 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:44:32,091 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:44:32,091 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:44:32,109 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:44:32,109 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:44:32,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:44:32 BoogieIcfgContainer [2024-09-20 19:44:32,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:44:32,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:44:32,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:44:32,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:44:32,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:44:31" (1/3) ... [2024-09-20 19:44:32,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1048981d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:44:32, skipping insertion in model container [2024-09-20 19:44:32,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:31" (2/3) ... [2024-09-20 19:44:32,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1048981d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:44:32, skipping insertion in model container [2024-09-20 19:44:32,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:44:32" (3/3) ... [2024-09-20 19:44:32,118 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2024-09-20 19:44:32,130 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:44:32,130 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:44:32,175 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:44:32,181 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;@7490d121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:44:32,182 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:44:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:44:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 19:44:32,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:32,195 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:32,196 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -620791457, now seen corresponding path program 1 times [2024-09-20 19:44:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075408987] [2024-09-20 19:44:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:32,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:44:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:32,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:44:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:32,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:44:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:44:32,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075408987] [2024-09-20 19:44:32,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075408987] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:44:32,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:44:32,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:44:32,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073281363] [2024-09-20 19:44:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:32,376 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:44:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:44:32,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:44:32,396 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:44:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:32,418 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-09-20 19:44:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:44:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 19:44:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:32,428 INFO L225 Difference]: With dead ends: 48 [2024-09-20 19:44:32,429 INFO L226 Difference]: Without dead ends: 23 [2024-09-20 19:44:32,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:44:32,436 INFO L434 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:32,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-20 19:44:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-20 19:44:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:44:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-20 19:44:32,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2024-09-20 19:44:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:32,471 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-20 19:44:32,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:44:32,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-20 19:44:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 19:44:32,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:32,473 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:32,473 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:44:32,474 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:32,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash -959298087, now seen corresponding path program 1 times [2024-09-20 19:44:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:32,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406353116] [2024-09-20 19:44:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:32,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969509639] [2024-09-20 19:44:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:32,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:32,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:32,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:44:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:44:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:32,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:44:32,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:44:32,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:44:32,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:32,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406353116] [2024-09-20 19:44:32,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969509639] [2024-09-20 19:44:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969509639] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:44:32,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:44:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:44:32,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208929697] [2024-09-20 19:44:32,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:32,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:44:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:44:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:44:32,708 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:44:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:32,772 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-09-20 19:44:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:44:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-09-20 19:44:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:32,774 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:44:32,775 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:44:32,775 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:44:32,777 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:32,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:44:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:44:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:44:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-20 19:44:32,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2024-09-20 19:44:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:32,787 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-20 19:44:32,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:44:32,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-20 19:44:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 19:44:32,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:32,790 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:32,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:44:32,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:32,991 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:32,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1544704875, now seen corresponding path program 1 times [2024-09-20 19:44:32,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:32,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855435364] [2024-09-20 19:44:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:32,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:33,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991758941] [2024-09-20 19:44:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:33,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:33,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:44:33,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:44:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:33,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:44:33,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:44:33,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:44:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855435364] [2024-09-20 19:44:33,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991758941] [2024-09-20 19:44:33,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991758941] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:44:33,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:44:33,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 19:44:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670818295] [2024-09-20 19:44:33,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:33,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:44:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:33,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:44:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:44:33,309 INFO L87 Difference]: Start difference. First operand 30 states and 33 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:44:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:33,367 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-09-20 19:44:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:44:33,368 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-20 19:44:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:33,370 INFO L225 Difference]: With dead ends: 36 [2024-09-20 19:44:33,370 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 19:44:33,370 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:44:33,372 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:33,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 19:44:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-20 19:44:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:44:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-09-20 19:44:33,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2024-09-20 19:44:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:33,392 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-09-20 19:44:33,392 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:44:33,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-09-20 19:44:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 19:44:33,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:33,397 INFO L216 NwaCegarLoop]: trace histogram [4, 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] [2024-09-20 19:44:33,413 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:44:33,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:33,598 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:33,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash 21814286, now seen corresponding path program 1 times [2024-09-20 19:44:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:33,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300554315] [2024-09-20 19:44:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:33,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130132807] [2024-09-20 19:44:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:33,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:44:33,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:44:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:33,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:44:33,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:44:33,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:44:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300554315] [2024-09-20 19:44:34,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130132807] [2024-09-20 19:44:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130132807] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:44:34,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:44:34,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-20 19:44:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113672900] [2024-09-20 19:44:34,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:44:34,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:44:34,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:44:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:44:34,377 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 19:44:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:34,747 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-09-20 19:44:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:44:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2024-09-20 19:44:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:34,749 INFO L225 Difference]: With dead ends: 53 [2024-09-20 19:44:34,750 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 19:44:34,750 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:44:34,752 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:34,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 178 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:44:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 19:44:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 19:44:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:44:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-20 19:44:34,782 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2024-09-20 19:44:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:34,783 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-20 19:44:34,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 19:44:34,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-20 19:44:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 19:44:34,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:34,786 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:34,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:44:34,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:34,991 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:34,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash -244405920, now seen corresponding path program 2 times [2024-09-20 19:44:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:34,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563833463] [2024-09-20 19:44:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:34,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:44:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:44:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:44:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 19:44:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 19:44:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:44:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 19:44:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:44:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 19:44:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 19:44:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563833463] [2024-09-20 19:44:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563833463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:44:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040416381] [2024-09-20 19:44:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:44:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:35,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:44:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:44:35,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:44:35,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:44:35,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:44:35,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 19:44:35,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 19:44:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040416381] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:44:35,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:44:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-09-20 19:44:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915271783] [2024-09-20 19:44:35,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:44:35,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:44:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:44:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:44:35,844 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 19:44:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:35,912 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2024-09-20 19:44:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:44:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) Word has length 60 [2024-09-20 19:44:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:35,913 INFO L225 Difference]: With dead ends: 47 [2024-09-20 19:44:35,913 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:44:35,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:44:35,914 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:35,915 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:44:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:44:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:44:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:44:35,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2024-09-20 19:44:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:35,916 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:44:35,916 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 19:44:35,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:44:35,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:44:35,921 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:44:35,940 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:44:36,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:36,127 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-09-20 19:44:36,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:44:36,395 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:44:36,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:44:36 BoogieIcfgContainer [2024-09-20 19:44:36,409 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:44:36,410 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:44:36,410 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:44:36,410 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:44:36,411 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:44:32" (3/4) ... [2024-09-20 19:44:36,415 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:44:36,466 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:44:36,466 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:44:36,467 INFO L158 Benchmark]: Toolchain (without parser) took 4903.31ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 124.7MB in the beginning and 159.8MB in the end (delta: -35.0MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2024-09-20 19:44:36,467 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 172.0MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:44:36,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.98ms. Allocated memory is still 172.0MB. Free memory was 124.7MB in the beginning and 112.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:44:36,468 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.33ms. Allocated memory is still 172.0MB. Free memory was 112.8MB in the beginning and 111.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:44:36,468 INFO L158 Benchmark]: Boogie Preprocessor took 30.65ms. Allocated memory is still 172.0MB. Free memory was 111.4MB in the beginning and 110.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:44:36,468 INFO L158 Benchmark]: RCFGBuilder took 273.83ms. Allocated memory is still 172.0MB. Free memory was 110.0MB in the beginning and 96.7MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 19:44:36,469 INFO L158 Benchmark]: TraceAbstraction took 4297.48ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 96.0MB in the beginning and 161.9MB in the end (delta: -65.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:44:36,469 INFO L158 Benchmark]: Witness Printer took 56.37ms. Allocated memory is still 218.1MB. Free memory was 161.9MB in the beginning and 159.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:44:36,472 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 172.0MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.98ms. Allocated memory is still 172.0MB. Free memory was 124.7MB in the beginning and 112.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.33ms. Allocated memory is still 172.0MB. Free memory was 112.8MB in the beginning and 111.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.65ms. Allocated memory is still 172.0MB. Free memory was 111.4MB in the beginning and 110.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 273.83ms. Allocated memory is still 172.0MB. Free memory was 110.0MB in the beginning and 96.7MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4297.48ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 96.0MB in the beginning and 161.9MB in the end (delta: -65.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 56.37ms. Allocated memory is still 218.1MB. Free memory was 161.9MB in the beginning and 159.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 470 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 364 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 224 IncrementalHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 106 mSDtfsCounter, 224 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 265 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 347 ConstructedInterpolants, 0 QuantifiedInterpolants, 1317 SizeOfPredicates, 5 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 360/392 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((y == 1) && (x == 1)) && (k == 1)) && (c == 1)) || (((((x == 0) && (0 <= k)) && (k <= 1)) && (c == 0)) && (y == 0))) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:44:36,493 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE