./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/cohendiv-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 881c8a19bc7d985c1c357993fa89c98038c14e3d30b81b5db0457e690440ac95 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 23:32:46,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 23:32:47,040 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 23:32:47,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 23:32:47,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 23:32:47,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 23:32:47,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 23:32:47,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 23:32:47,065 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 23:32:47,066 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 23:32:47,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 23:32:47,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 23:32:47,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 23:32:47,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 23:32:47,068 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 23:32:47,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 23:32:47,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 23:32:47,069 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 23:32:47,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 23:32:47,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 23:32:47,070 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 23:32:47,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 23:32:47,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 23:32:47,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 23:32:47,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 23:32:47,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 23:32:47,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 23:32:47,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 23:32:47,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 23:32:47,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 23:32:47,075 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 23:32:47,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 23:32:47,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:32:47,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 23:32:47,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 23:32:47,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 23:32:47,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 23:32:47,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 23:32:47,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 23:32:47,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 23:32:47,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 23:32:47,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 23:32:47,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 881c8a19bc7d985c1c357993fa89c98038c14e3d30b81b5db0457e690440ac95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 23:32:47,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 23:32:47,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 23:32:47,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 23:32:47,376 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 23:32:47,377 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 23:32:47,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2024-09-12 23:32:48,852 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 23:32:49,044 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 23:32:49,045 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2024-09-12 23:32:49,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3e8bfcbd5/0b11f98492d44befa26966811d12db83/FLAGdfd36be58 [2024-09-12 23:32:49,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3e8bfcbd5/0b11f98492d44befa26966811d12db83 [2024-09-12 23:32:49,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 23:32:49,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 23:32:49,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 23:32:49,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 23:32:49,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 23:32:49,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54990ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49, skipping insertion in model container [2024-09-12 23:32:49,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,454 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 23:32:49,597 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound10.c[576,589] [2024-09-12 23:32:49,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:32:49,640 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 23:32:49,652 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound10.c[576,589] [2024-09-12 23:32:49,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:32:49,687 INFO L204 MainTranslator]: Completed translation [2024-09-12 23:32:49,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49 WrapperNode [2024-09-12 23:32:49,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 23:32:49,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 23:32:49,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 23:32:49,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 23:32:49,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,710 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 23:32:49,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 23:32:49,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 23:32:49,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 23:32:49,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 23:32:49,746 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,748 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,768 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 23:32:49,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 23:32:49,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 23:32:49,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 23:32:49,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 23:32:49,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (1/1) ... [2024-09-12 23:32:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:32:49,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:49,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 23:32:49,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 23:32:49,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 23:32:49,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 23:32:49,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 23:32:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 23:32:49,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 23:32:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 23:32:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 23:32:49,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 23:32:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 23:32:49,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 23:32:49,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 23:32:49,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 23:32:49,946 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 23:32:49,948 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 23:32:50,117 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 23:32:50,117 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 23:32:50,136 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 23:32:50,136 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 23:32:50,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:50 BoogieIcfgContainer [2024-09-12 23:32:50,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 23:32:50,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 23:32:50,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 23:32:50,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 23:32:50,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 11:32:49" (1/3) ... [2024-09-12 23:32:50,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404b2c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:32:50, skipping insertion in model container [2024-09-12 23:32:50,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:49" (2/3) ... [2024-09-12 23:32:50,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404b2c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:32:50, skipping insertion in model container [2024-09-12 23:32:50,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:50" (3/3) ... [2024-09-12 23:32:50,146 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound10.c [2024-09-12 23:32:50,160 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 23:32:50,160 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 23:32:50,209 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 23:32:50,216 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;@49954dbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 23:32:50,216 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 23:32:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 23:32:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 23:32:50,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:50,228 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:50,229 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:50,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash -381179752, now seen corresponding path program 1 times [2024-09-12 23:32:50,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:50,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545296358] [2024-09-12 23:32:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:32:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:32:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 23:32:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:50,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545296358] [2024-09-12 23:32:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545296358] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:50,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:50,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 23:32:50,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746473353] [2024-09-12 23:32:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:50,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 23:32:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 23:32:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 23:32:50,473 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:32:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:50,509 INFO L93 Difference]: Finished difference Result 68 states and 107 transitions. [2024-09-12 23:32:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 23:32:50,512 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-12 23:32:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:50,519 INFO L225 Difference]: With dead ends: 68 [2024-09-12 23:32:50,519 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 23:32:50,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 23:32:50,525 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:50,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:32:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 23:32:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-12 23:32:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 23:32:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-09-12 23:32:50,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 27 [2024-09-12 23:32:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:50,566 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-09-12 23:32:50,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:32:50,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-09-12 23:32:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 23:32:50,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:50,569 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:50,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 23:32:50,570 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:50,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1528397532, now seen corresponding path program 1 times [2024-09-12 23:32:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825343651] [2024-09-12 23:32:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:50,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790421761] [2024-09-12 23:32:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:50,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:50,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:50,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:50,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 23:32:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:50,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:32:50,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 23:32:50,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:50,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:50,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825343651] [2024-09-12 23:32:50,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790421761] [2024-09-12 23:32:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790421761] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434384078] [2024-09-12 23:32:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:50,817 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:50,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:50,819 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 23:32:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:50,877 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-12 23:32:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-12 23:32:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:50,880 INFO L225 Difference]: With dead ends: 44 [2024-09-12 23:32:50,880 INFO L226 Difference]: Without dead ends: 42 [2024-09-12 23:32:50,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:32:50,882 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:50,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:32:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-12 23:32:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-12 23:32:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 23:32:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-12 23:32:50,905 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 27 [2024-09-12 23:32:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:50,906 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-12 23:32:50,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 23:32:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-12 23:32:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 23:32:50,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:50,907 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:50,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 23:32:51,108 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 [2024-09-12 23:32:51,108 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -279158019, now seen corresponding path program 1 times [2024-09-12 23:32:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384444343] [2024-09-12 23:32:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:51,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969007135] [2024-09-12 23:32:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:51,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:51,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:51,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 23:32:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:51,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 23:32:51,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 23:32:51,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384444343] [2024-09-12 23:32:51,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969007135] [2024-09-12 23:32:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969007135] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:51,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:32:51,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 23:32:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119124352] [2024-09-12 23:32:51,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:32:51,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 23:32:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 23:32:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-12 23:32:51,435 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:32:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:51,599 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-09-12 23:32:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 23:32:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-12 23:32:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:51,601 INFO L225 Difference]: With dead ends: 56 [2024-09-12 23:32:51,601 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 23:32:51,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-09-12 23:32:51,602 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:51,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 23:32:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-09-12 23:32:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 23:32:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2024-09-12 23:32:51,615 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 32 [2024-09-12 23:32:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:51,616 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2024-09-12 23:32:51,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:32:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2024-09-12 23:32:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 23:32:51,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:51,618 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 23:32:51,822 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 [2024-09-12 23:32:51,823 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:51,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2042149491, now seen corresponding path program 1 times [2024-09-12 23:32:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:51,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873517458] [2024-09-12 23:32:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267727853] [2024-09-12 23:32:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:51,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:51,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 23:32:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:51,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:32:51,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 23:32:51,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:51,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873517458] [2024-09-12 23:32:51,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267727853] [2024-09-12 23:32:51,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267727853] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:51,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:51,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:51,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633716550] [2024-09-12 23:32:51,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:51,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:51,942 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-12 23:32:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:52,038 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2024-09-12 23:32:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-09-12 23:32:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:52,040 INFO L225 Difference]: With dead ends: 78 [2024-09-12 23:32:52,040 INFO L226 Difference]: Without dead ends: 76 [2024-09-12 23:32:52,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:32:52,041 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:52,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-12 23:32:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-09-12 23:32:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 23:32:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2024-09-12 23:32:52,076 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 39 [2024-09-12 23:32:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:52,077 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2024-09-12 23:32:52,077 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-12 23:32:52,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2024-09-12 23:32:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 23:32:52,083 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:52,083 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:52,097 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 23:32:52,283 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 [2024-09-12 23:32:52,284 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:52,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1095671213, now seen corresponding path program 1 times [2024-09-12 23:32:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:52,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740053212] [2024-09-12 23:32:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:32:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:32:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:32:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:32:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 23:32:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 23:32:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 23:32:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740053212] [2024-09-12 23:32:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740053212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398844879] [2024-09-12 23:32:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:52,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:52,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 23:32:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:52,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:32:52,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 23:32:52,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398844879] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:52,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:32:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2024-09-12 23:32:52,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041794938] [2024-09-12 23:32:52,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:52,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 23:32:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 23:32:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-09-12 23:32:52,809 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 23:32:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:52,940 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-12 23:32:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 23:32:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2024-09-12 23:32:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:52,946 INFO L225 Difference]: With dead ends: 75 [2024-09-12 23:32:52,946 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 23:32:52,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-09-12 23:32:52,947 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:52,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 23:32:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-12 23:32:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 23:32:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2024-09-12 23:32:52,970 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 49 [2024-09-12 23:32:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:52,971 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2024-09-12 23:32:52,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 23:32:52,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2024-09-12 23:32:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 23:32:52,972 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:52,973 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:52,989 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 23:32:53,176 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 [2024-09-12 23:32:53,177 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:53,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 872567173, now seen corresponding path program 1 times [2024-09-12 23:32:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:53,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505787920] [2024-09-12 23:32:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:32:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:32:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:32:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:32:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 23:32:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 23:32:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 23:32:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:32:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505787920] [2024-09-12 23:32:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505787920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969335241] [2024-09-12 23:32:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:53,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:53,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 23:32:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:53,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 23:32:53,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:32:53,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 23:32:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969335241] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:53,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:32:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 12 [2024-09-12 23:32:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672078149] [2024-09-12 23:32:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:53,678 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 23:32:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 23:32:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-12 23:32:53,679 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-12 23:32:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:53,767 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-12 23:32:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 23:32:53,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-12 23:32:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:53,769 INFO L225 Difference]: With dead ends: 79 [2024-09-12 23:32:53,770 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 23:32:53,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-12 23:32:53,771 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:53,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 23:32:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-12 23:32:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 23:32:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-09-12 23:32:53,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 55 [2024-09-12 23:32:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:53,787 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-09-12 23:32:53,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-12 23:32:53,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-09-12 23:32:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 23:32:53,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:53,789 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:53,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 23:32:53,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 23:32:53,994 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:53,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:53,994 INFO L85 PathProgramCache]: Analyzing trace with hash 776950322, now seen corresponding path program 1 times [2024-09-12 23:32:53,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:53,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671319581] [2024-09-12 23:32:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:53,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:54,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422361789] [2024-09-12 23:32:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:54,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:54,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 23:32:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:54,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 23:32:54,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 23:32:54,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 23:32:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:54,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671319581] [2024-09-12 23:32:54,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422361789] [2024-09-12 23:32:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422361789] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:54,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:32:54,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-12 23:32:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195952105] [2024-09-12 23:32:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:54,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 23:32:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 23:32:54,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-12 23:32:54,626 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-12 23:32:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:54,748 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2024-09-12 23:32:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:54,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2024-09-12 23:32:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:54,752 INFO L225 Difference]: With dead ends: 77 [2024-09-12 23:32:54,752 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 23:32:54,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:32:54,753 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:54,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 23:32:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 23:32:54,754 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) [2024-09-12 23:32:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 23:32:54,754 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2024-09-12 23:32:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:54,754 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 23:32:54,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-12 23:32:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 23:32:54,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 23:32:54,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 23:32:54,777 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 23:32:54,960 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:54,964 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:54,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 23:32:55,540 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 23:32:55,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 11:32:55 BoogieIcfgContainer [2024-09-12 23:32:55,556 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 23:32:55,557 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 23:32:55,557 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 23:32:55,557 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 23:32:55,558 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:50" (3/4) ... [2024-09-12 23:32:55,559 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 23:32:55,563 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 23:32:55,563 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-12 23:32:55,563 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 23:32:55,563 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 23:32:55,567 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2024-09-12 23:32:55,567 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-12 23:32:55,567 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 23:32:55,567 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 23:32:55,658 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 23:32:55,659 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 23:32:55,659 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 23:32:55,659 INFO L158 Benchmark]: Toolchain (without parser) took 6238.62ms. Allocated memory was 148.9MB in the beginning and 184.5MB in the end (delta: 35.7MB). Free memory was 80.1MB in the beginning and 52.5MB in the end (delta: 27.5MB). Peak memory consumption was 65.5MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,659 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:32:55,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.33ms. Allocated memory is still 148.9MB. Free memory was 79.8MB in the beginning and 67.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.44ms. Allocated memory is still 148.9MB. Free memory was 67.5MB in the beginning and 122.9MB in the end (delta: -55.4MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,660 INFO L158 Benchmark]: Boogie Preprocessor took 53.80ms. Allocated memory is still 148.9MB. Free memory was 122.9MB in the beginning and 120.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,660 INFO L158 Benchmark]: RCFGBuilder took 350.32ms. Allocated memory is still 148.9MB. Free memory was 120.8MB in the beginning and 107.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,661 INFO L158 Benchmark]: TraceAbstraction took 5418.37ms. Allocated memory was 148.9MB in the beginning and 184.5MB in the end (delta: 35.7MB). Free memory was 107.2MB in the beginning and 57.8MB in the end (delta: 49.4MB). Peak memory consumption was 84.5MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,661 INFO L158 Benchmark]: Witness Printer took 101.85ms. Allocated memory is still 184.5MB. Free memory was 56.7MB in the beginning and 52.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 23:32:55,662 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.33ms. Allocated memory is still 148.9MB. Free memory was 79.8MB in the beginning and 67.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.44ms. Allocated memory is still 148.9MB. Free memory was 67.5MB in the beginning and 122.9MB in the end (delta: -55.4MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.80ms. Allocated memory is still 148.9MB. Free memory was 122.9MB in the beginning and 120.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 350.32ms. Allocated memory is still 148.9MB. Free memory was 120.8MB in the beginning and 107.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5418.37ms. Allocated memory was 148.9MB in the beginning and 184.5MB in the end (delta: 35.7MB). Free memory was 107.2MB in the beginning and 57.8MB in the end (delta: 49.4MB). Peak memory consumption was 84.5MB. Max. memory is 16.1GB. * Witness Printer took 101.85ms. Allocated memory is still 184.5MB. Free memory was 56.7MB in the beginning and 52.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 71 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 971 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 728 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 425 IncrementalHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 243 mSDtfsCounter, 425 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=6, InterpolantAutomatonStates: 39, 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, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 501 ConstructedInterpolants, 0 QuantifiedInterpolants, 1183 SizeOfPredicates, 15 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 476/506 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: 47]: Loop Invariant Derived loop invariant: (((((((__int128) q * y) + r) == x) && (1 <= r)) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (1 <= y)) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((__int128) q * y) + r) == x) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (1 <= y)) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-12 23:32:55,692 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE