./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.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 f1d7dc9d 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/geo1-ll_unwindbound20.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 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a --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-f1d7dc9-m [2024-09-20 12:37:57,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:37:57,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:37:57,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:37:57,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:37:57,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:37:57,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:37:57,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:37:57,782 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:37:57,782 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:37:57,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:37:57,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:37:57,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:37:57,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:37:57,786 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:37:57,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:37:57,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:37:57,787 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:37:57,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:37:57,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:37:57,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:37:57,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:37:57,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:37:57,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:37:57,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:37:57,791 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:37:57,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:37:57,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:37:57,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:37:57,792 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:37:57,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:37:57,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:37:57,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:37:57,793 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:37:57,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:37:57,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:37:57,794 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:37:57,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:37:57,794 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:37:57,794 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:37:57,795 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:37:57,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:37:57,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:37:58,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:37:58,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:37:58,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:37:58,054 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:37:58,055 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:37:58,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2024-09-20 12:37:59,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:37:59,646 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:37:59,647 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2024-09-20 12:37:59,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/faee536b8/ce323b7188084709b7ff15b883e70af4/FLAGb26b0535e [2024-09-20 12:37:59,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/faee536b8/ce323b7188084709b7ff15b883e70af4 [2024-09-20 12:37:59,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:37:59,682 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:37:59,684 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:37:59,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:37:59,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:37:59,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:37:59,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b6dc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59, skipping insertion in model container [2024-09-20 12:37:59,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:37:59,713 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:37:59,888 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/geo1-ll_unwindbound20.c[546,559] [2024-09-20 12:37:59,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:37:59,955 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:37:59,967 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/geo1-ll_unwindbound20.c[546,559] [2024-09-20 12:37:59,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:37:59,995 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:37:59,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59 WrapperNode [2024-09-20 12:37:59,996 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:37:59,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:37:59,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:37:59,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:38:00,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,023 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:38:00,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:38:00,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:38:00,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:38:00,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:38:00,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,046 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 12:38:00,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:38:00,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:38:00,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:38:00,058 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:38:00,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (1/1) ... [2024-09-20 12:38:00,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:38:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:38:00,091 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 12:38:00,094 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 12:38:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:38:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:38:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:38:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:38:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:38:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:38:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:38:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:38:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:38:00,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:38:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:38:00,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:38:00,197 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:38:00,199 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:38:00,379 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 12:38:00,380 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:38:00,408 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:38:00,408 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 12:38:00,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:38:00 BoogieIcfgContainer [2024-09-20 12:38:00,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:38:00,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:38:00,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:38:00,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:38:00,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:37:59" (1/3) ... [2024-09-20 12:38:00,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572b67b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:38:00, skipping insertion in model container [2024-09-20 12:38:00,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:37:59" (2/3) ... [2024-09-20 12:38:00,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572b67b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:38:00, skipping insertion in model container [2024-09-20 12:38:00,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:38:00" (3/3) ... [2024-09-20 12:38:00,418 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2024-09-20 12:38:00,434 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:38:00,435 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:38:00,492 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:38:00,500 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;@14662d44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:38:00,500 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:38:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:38:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:38:00,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:38:00,512 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:38:00,512 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:38:00,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:00,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1666515900, now seen corresponding path program 1 times [2024-09-20 12:38:00,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:38:00,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223840932] [2024-09-20 12:38:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:38:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:00,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:38:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:00,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:38:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:00,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:38:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:00,685 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 12:38:00,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:00,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223840932] [2024-09-20 12:38:00,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223840932] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:38:00,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:38:00,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:38:00,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831878350] [2024-09-20 12:38:00,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:38:00,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:38:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:38:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:38:00,718 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 12:38:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:38:00,812 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-20 12:38:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:38:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 22 [2024-09-20 12:38:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:38:00,822 INFO L225 Difference]: With dead ends: 51 [2024-09-20 12:38:00,822 INFO L226 Difference]: Without dead ends: 25 [2024-09-20 12:38:00,824 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:38:00,827 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:38:00,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:38:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-20 12:38:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-20 12:38:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:38:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-20 12:38:00,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2024-09-20 12:38:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:38:00,863 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-20 12:38:00,863 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 12:38:00,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-20 12:38:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:38:00,865 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:38:00,865 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:38:00,865 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:38:00,866 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:38:00,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -387848543, now seen corresponding path program 1 times [2024-09-20 12:38:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:38:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329902494] [2024-09-20 12:38:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:38:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:38:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815710998] [2024-09-20 12:38:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:00,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:38:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:38:00,904 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 12:38:00,907 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 12:38:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:00,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:38:00,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:38:01,048 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 12:38:01,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:38:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329902494] [2024-09-20 12:38:01,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:38:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815710998] [2024-09-20 12:38:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815710998] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:38:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:38:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:38:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530276355] [2024-09-20 12:38:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:38:01,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:38:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:38:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:38:01,053 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (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 12:38:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:38:01,117 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-20 12:38:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:38:01,117 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, (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 22 [2024-09-20 12:38:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:38:01,118 INFO L225 Difference]: With dead ends: 35 [2024-09-20 12:38:01,118 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 12:38:01,119 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 12:38:01,120 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 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 [2024-09-20 12:38:01,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:38:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 12:38:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-20 12:38:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:38:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-20 12:38:01,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2024-09-20 12:38:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:38:01,139 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-20 12:38:01,139 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, (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 12:38:01,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-20 12:38:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 12:38:01,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:38:01,143 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:38:01,157 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 12:38:01,343 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 12:38:01,344 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:38:01,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 783720481, now seen corresponding path program 1 times [2024-09-20 12:38:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:38:01,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896446834] [2024-09-20 12:38:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:01,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:38:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:01,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:38:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:01,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:38:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:01,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:38:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:01,584 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 12:38:01,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:01,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896446834] [2024-09-20 12:38:01,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896446834] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:38:01,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:38:01,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:38:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887845910] [2024-09-20 12:38:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:38:01,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:38:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:38:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:38:01,592 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:38:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:38:01,679 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-20 12:38:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:38:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-20 12:38:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:38:01,682 INFO L225 Difference]: With dead ends: 39 [2024-09-20 12:38:01,682 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 12:38:01,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 12:38:01,685 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:38:01,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:38:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 12:38:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 12:38:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:38:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-20 12:38:01,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2024-09-20 12:38:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:38:01,703 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-20 12:38:01,704 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:38:01,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-20 12:38:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 12:38:01,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:38:01,707 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:38:01,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:38:01,708 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:38:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1293449266, now seen corresponding path program 1 times [2024-09-20 12:38:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:38:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121459533] [2024-09-20 12:38:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:38:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:38:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:38:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:38:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:38:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:38:02,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:02,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121459533] [2024-09-20 12:38:02,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121459533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:38:02,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083362693] [2024-09-20 12:38:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:02,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:38:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:38:02,071 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 12:38:02,072 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 12:38:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:02,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 12:38:02,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:38:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:38:02,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:38:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:38:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083362693] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:38:02,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:38:02,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2024-09-20 12:38:02,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014059385] [2024-09-20 12:38:02,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:38:02,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:38:02,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:38:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:38:02,553 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:38:06,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:38:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:38:06,787 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-20 12:38:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:38:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-09-20 12:38:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:38:06,789 INFO L225 Difference]: With dead ends: 45 [2024-09-20 12:38:06,789 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 12:38:06,789 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:38:06,790 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:38:06,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-20 12:38:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 12:38:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 12:38:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:38:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-20 12:38:06,801 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2024-09-20 12:38:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:38:06,801 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-20 12:38:06,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:38:06,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-20 12:38:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:38:06,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:38:06,803 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:38:06,819 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:38:07,007 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:38:07,008 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:38:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:38:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1959775791, now seen corresponding path program 1 times [2024-09-20 12:38:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:38:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884832160] [2024-09-20 12:38:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:07,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:38:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:38:07,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003160052] [2024-09-20 12:38:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:38:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:38:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:38:07,055 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 12:38:07,058 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 12:38:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:38:07,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:38:07,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:38:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:38:07,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:38:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:38:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:20,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884832160] [2024-09-20 12:38:20,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:38:20,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003160052] [2024-09-20 12:38:20,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003160052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:38:20,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:38:20,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-20 12:38:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455432700] [2024-09-20 12:38:20,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:38:20,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:38:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:38:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2024-09-20 12:38:20,766 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 12:38:32,481 WARN L293 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:38:36,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:38:49,818 WARN L293 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:38:53,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:38:57,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:01,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:05,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:09,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:13,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:33,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:38,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:42,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:46,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:50,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:54,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:39:58,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:40:02,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:40:06,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:40:10,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:40:14,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:40:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:40:14,060 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-20 12:40:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 12:40:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38 [2024-09-20 12:40:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:40:14,063 INFO L225 Difference]: With dead ends: 66 [2024-09-20 12:40:14,063 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 12:40:14,063 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.2s TimeCoverageRelationStatistics Valid=74, Invalid=259, Unknown=9, NotChecked=0, Total=342 [2024-09-20 12:40:14,064 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:40:14,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 72.8s Time] [2024-09-20 12:40:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 12:40:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-20 12:40:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:40:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-20 12:40:14,086 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 38 [2024-09-20 12:40:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:40:14,086 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-20 12:40:14,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 12:40:14,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:40:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-20 12:40:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:40:14,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:40:14,088 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 12:40:14,106 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 12:40:14,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:40:14,293 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:40:14,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:40:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash -701383951, now seen corresponding path program 1 times [2024-09-20 12:40:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:40:14,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227416087] [2024-09-20 12:40:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:40:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:40:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:40:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:40:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:40:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:40:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:40:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:40:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:40:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227416087] [2024-09-20 12:40:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227416087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:40:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985984079] [2024-09-20 12:40:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:40:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:40:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:40:14,414 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 12:40:14,425 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 12:40:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:40:14,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:40:14,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:40:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:40:14,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:40:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:40:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985984079] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:40:14,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:40:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-20 12:40:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959036786] [2024-09-20 12:40:14,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:40:14,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:40:14,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:40:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:40:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:40:14,634 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 12:40:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:40:14,855 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-20 12:40:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 12:40:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 39 [2024-09-20 12:40:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:40:14,856 INFO L225 Difference]: With dead ends: 79 [2024-09-20 12:40:14,857 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 12:40:14,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:40:14,858 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:40:14,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:40:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 12:40:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-20 12:40:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 51 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:40:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-09-20 12:40:14,888 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 39 [2024-09-20 12:40:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:40:14,888 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-09-20 12:40:14,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 12:40:14,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:40:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-09-20 12:40:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 12:40:14,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:40:14,892 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:40:14,909 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 12:40:15,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:40:15,093 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:40:15,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:40:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1815586865, now seen corresponding path program 2 times [2024-09-20 12:40:15,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:40:15,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886842669] [2024-09-20 12:40:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:40:15,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:40:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:40:15,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314767285] [2024-09-20 12:40:15,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:40:15,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:40:15,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:40:15,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:40:15,177 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:40:15,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:40:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:40:15,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:40:15,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:40:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 12:40:15,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:42:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 78 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 12:42:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:42:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886842669] [2024-09-20 12:42:40,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:42:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314767285] [2024-09-20 12:42:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314767285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:42:40,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:42:40,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2024-09-20 12:42:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34098279] [2024-09-20 12:42:40,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:42:40,085 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:42:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:42:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:42:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=418, Unknown=23, NotChecked=0, Total=552 [2024-09-20 12:42:40,087 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 14 states have call predecessors, (17), 15 states have call successors, (17)