./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:44:54,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:44:54,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:44:54,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:44:54,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:44:54,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:44:54,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:44:54,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:44:54,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:44:54,108 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:44:54,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:44:54,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:44:54,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:44:54,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:44:54,110 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:44:54,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:44:54,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:44:54,111 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:44:54,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:44:54,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:44:54,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:44:54,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:44:54,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:44:54,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:44:54,112 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:44:54,113 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:44:54,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:44:54,113 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:44:54,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:44:54,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:44:54,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:44:54,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:44:54,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:44:54,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:44:54,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:44:54,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:44:54,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:44:54,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:44:54,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:44:54,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:44:54,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:44:54,345 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:44:54,346 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:44:54,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2024-09-21 11:44:55,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:44:55,727 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:44:55,729 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2024-09-21 11:44:55,735 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/94f9e9b48/7c3311de6b9c40aab3794eb27c0b4efe/FLAGae6cb79cf [2024-09-21 11:44:56,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/94f9e9b48/7c3311de6b9c40aab3794eb27c0b4efe [2024-09-21 11:44:56,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:44:56,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:44:56,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:44:56,142 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:44:56,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:44:56,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5ff0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56, skipping insertion in model container [2024-09-21 11:44:56,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,173 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:44:56,278 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2024-09-21 11:44:56,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:44:56,302 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:44:56,311 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2024-09-21 11:44:56,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:44:56,330 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:44:56,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56 WrapperNode [2024-09-21 11:44:56,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:44:56,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:44:56,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:44:56,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:44:56,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,341 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,346 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:44:56,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:44:56,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:44:56,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:44:56,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:44:56,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,378 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]. [2024-09-21 11:44:56,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,395 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:44:56,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:44:56,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:44:56,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:44:56,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (1/1) ... [2024-09-21 11:44:56,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:44:56,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:56,442 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) [2024-09-21 11:44:56,443 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 [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:44:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:44:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:44:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:44:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:44:56,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:44:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:44:56,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:44:56,527 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:44:56,529 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:44:56,663 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-21 11:44:56,663 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:44:56,688 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:44:56,689 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:44:56,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:44:56 BoogieIcfgContainer [2024-09-21 11:44:56,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:44:56,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:44:56,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:44:56,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:44:56,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:44:56" (1/3) ... [2024-09-21 11:44:56,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3817a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:44:56, skipping insertion in model container [2024-09-21 11:44:56,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:44:56" (2/3) ... [2024-09-21 11:44:56,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3817a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:44:56, skipping insertion in model container [2024-09-21 11:44:56,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:44:56" (3/3) ... [2024-09-21 11:44:56,698 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2024-09-21 11:44:56,712 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:44:56,712 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:44:56,770 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:44:56,776 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;@15e25341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:44:56,777 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:44:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 11:44:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:44:56,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:56,789 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:56,789 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:56,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1802650881, now seen corresponding path program 1 times [2024-09-21 11:44:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103676414] [2024-09-21 11:44:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:56,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:44:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:56,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:44:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:44:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103676414] [2024-09-21 11:44:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103676414] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:44:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:44:56,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:44:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677448242] [2024-09-21 11:44:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:44:56,967 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:44:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:44:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:44:56,988 INFO L87 Difference]: Start difference. First operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:44:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:57,011 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2024-09-21 11:44:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:44:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:44:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:57,018 INFO L225 Difference]: With dead ends: 60 [2024-09-21 11:44:57,018 INFO L226 Difference]: Without dead ends: 30 [2024-09-21 11:44:57,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:44:57,023 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:57,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:44:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-21 11:44:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-21 11:44:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 11:44:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-21 11:44:57,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 16 [2024-09-21 11:44:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:57,055 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-21 11:44:57,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:44:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-21 11:44:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:44:57,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:57,058 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:57,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:44:57,059 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:57,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1133972673, now seen corresponding path program 1 times [2024-09-21 11:44:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058680346] [2024-09-21 11:44:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:57,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:57,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:44:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:57,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:44:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:44:57,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:57,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058680346] [2024-09-21 11:44:57,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058680346] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:44:57,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:44:57,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:44:57,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413440967] [2024-09-21 11:44:57,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:44:57,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:44:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:44:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:44:57,307 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:44:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:57,419 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-09-21 11:44:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:44:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:44:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:57,421 INFO L225 Difference]: With dead ends: 36 [2024-09-21 11:44:57,421 INFO L226 Difference]: Without dead ends: 34 [2024-09-21 11:44:57,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:44:57,422 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:57,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:44:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-21 11:44:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-21 11:44:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 11:44:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-21 11:44:57,432 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2024-09-21 11:44:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:57,432 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-21 11:44:57,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:44:57,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-21 11:44:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 11:44:57,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:57,433 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:57,433 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:44:57,434 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:57,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,434 INFO L85 PathProgramCache]: Analyzing trace with hash -295453008, now seen corresponding path program 1 times [2024-09-21 11:44:57,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140862721] [2024-09-21 11:44:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113953748] [2024-09-21 11:44:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:57,454 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) [2024-09-21 11:44:57,455 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:44:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:57,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:44:57,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:44:57,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:44:57,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140862721] [2024-09-21 11:44:57,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113953748] [2024-09-21 11:44:57,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113953748] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:44:57,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:44:57,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:44:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59702016] [2024-09-21 11:44:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:44:57,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:44:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:44:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:44:57,562 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:44:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:57,624 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-21 11:44:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:44:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-21 11:44:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:57,627 INFO L225 Difference]: With dead ends: 53 [2024-09-21 11:44:57,628 INFO L226 Difference]: Without dead ends: 51 [2024-09-21 11:44:57,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:44:57,631 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:57,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:44:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-21 11:44:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-21 11:44:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 11:44:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-21 11:44:57,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2024-09-21 11:44:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:57,655 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-21 11:44:57,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:44:57,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-21 11:44:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-21 11:44:57,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:57,656 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:57,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:44:57,856 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:57,857 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash 291539359, now seen corresponding path program 1 times [2024-09-21 11:44:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806872499] [2024-09-21 11:44:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:57,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065017539] [2024-09-21 11:44:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:57,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:57,873 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) [2024-09-21 11:44:57,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:44:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:57,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:44:57,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:44:57,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:44:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806872499] [2024-09-21 11:44:57,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065017539] [2024-09-21 11:44:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065017539] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:44:57,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:44:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:44:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255988638] [2024-09-21 11:44:57,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:44:57,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:44:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:44:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:44:57,975 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:44:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:58,042 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-09-21 11:44:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:44:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-21 11:44:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:58,045 INFO L225 Difference]: With dead ends: 57 [2024-09-21 11:44:58,046 INFO L226 Difference]: Without dead ends: 55 [2024-09-21 11:44:58,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:44:58,048 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:58,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:44:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-21 11:44:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-21 11:44:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-21 11:44:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-21 11:44:58,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2024-09-21 11:44:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:58,072 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-21 11:44:58,073 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:44:58,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-21 11:44:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 11:44:58,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:58,074 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:58,086 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:44:58,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:58,275 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:58,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1228581936, now seen corresponding path program 1 times [2024-09-21 11:44:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:58,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129414437] [2024-09-21 11:44:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:58,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750769966] [2024-09-21 11:44:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:58,312 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) [2024-09-21 11:44:58,316 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:44:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:58,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:44:58,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:44:58,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:44:58,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129414437] [2024-09-21 11:44:58,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750769966] [2024-09-21 11:44:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750769966] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:44:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:44:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:44:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595240224] [2024-09-21 11:44:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:44:58,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:44:58,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:44:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:44:58,431 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 11:44:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:58,515 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-21 11:44:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:44:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-21 11:44:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:58,517 INFO L225 Difference]: With dead ends: 65 [2024-09-21 11:44:58,517 INFO L226 Difference]: Without dead ends: 53 [2024-09-21 11:44:58,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:44:58,519 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:58,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:44:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-21 11:44:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-21 11:44:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-21 11:44:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-21 11:44:58,535 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2024-09-21 11:44:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:58,536 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-21 11:44:58,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 11:44:58,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-21 11:44:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-21 11:44:58,537 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:58,538 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:58,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:44:58,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:58,738 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 149987423, now seen corresponding path program 1 times [2024-09-21 11:44:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958184387] [2024-09-21 11:44:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:58,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:58,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429202919] [2024-09-21 11:44:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:58,784 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) [2024-09-21 11:44:58,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:44:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:58,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-21 11:44:58,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-21 11:44:58,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-21 11:44:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958184387] [2024-09-21 11:44:59,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429202919] [2024-09-21 11:44:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429202919] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:44:59,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:44:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-21 11:44:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143331055] [2024-09-21 11:44:59,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:59,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 11:44:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 11:44:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:44:59,098 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-21 11:44:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:59,336 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-21 11:44:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:44:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2024-09-21 11:44:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:59,338 INFO L225 Difference]: With dead ends: 76 [2024-09-21 11:44:59,338 INFO L226 Difference]: Without dead ends: 74 [2024-09-21 11:44:59,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:44:59,339 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:59,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:44:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-21 11:44:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-09-21 11:44:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-21 11:44:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-21 11:44:59,353 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 48 [2024-09-21 11:44:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:59,353 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-21 11:44:59,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-21 11:44:59,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-21 11:44:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-21 11:44:59,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:59,358 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:59,375 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:44:59,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:59,559 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:59,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash -883401392, now seen corresponding path program 2 times [2024-09-21 11:44:59,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:59,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535521153] [2024-09-21 11:44:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42858379] [2024-09-21 11:44:59,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:44:59,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:59,586 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) [2024-09-21 11:44:59,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:44:59,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:44:59,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:44:59,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-21 11:44:59,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-21 11:44:59,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-21 11:44:59,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:59,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535521153] [2024-09-21 11:44:59,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:59,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42858379] [2024-09-21 11:44:59,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42858379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:44:59,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:44:59,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-21 11:44:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61767784] [2024-09-21 11:44:59,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:59,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 11:44:59,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 11:44:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:44:59,867 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-21 11:45:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:00,078 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-09-21 11:45:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 11:45:00,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2024-09-21 11:45:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:00,079 INFO L225 Difference]: With dead ends: 88 [2024-09-21 11:45:00,080 INFO L226 Difference]: Without dead ends: 86 [2024-09-21 11:45:00,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:45:00,080 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:00,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:45:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-21 11:45:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-21 11:45:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-21 11:45:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-21 11:45:00,101 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 53 [2024-09-21 11:45:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:00,101 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-21 11:45:00,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-21 11:45:00,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-21 11:45:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 11:45:00,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:45:00,102 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:45:00,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:45:00,303 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:45:00,303 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:45:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash -607967553, now seen corresponding path program 3 times [2024-09-21 11:45:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:45:00,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652088237] [2024-09-21 11:45:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:45:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:45:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804438752] [2024-09-21 11:45:00,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:45:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:45:00,321 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) [2024-09-21 11:45:00,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:45:00,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-21 11:45:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:45:00,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-21 11:45:00,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:45:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:45:00,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:45:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:45:00,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:45:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652088237] [2024-09-21 11:45:00,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:45:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804438752] [2024-09-21 11:45:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804438752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:45:00,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:45:00,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-09-21 11:45:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532051497] [2024-09-21 11:45:00,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:45:00,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:45:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:45:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:45:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:45:00,608 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-21 11:45:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:00,833 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-09-21 11:45:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 11:45:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 58 [2024-09-21 11:45:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:00,834 INFO L225 Difference]: With dead ends: 96 [2024-09-21 11:45:00,834 INFO L226 Difference]: Without dead ends: 84 [2024-09-21 11:45:00,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-21 11:45:00,835 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:00,835 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 205 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:45:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-21 11:45:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2024-09-21 11:45:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 11:45:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-09-21 11:45:00,854 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 58 [2024-09-21 11:45:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:00,854 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-09-21 11:45:00,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-21 11:45:00,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-09-21 11:45:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-21 11:45:00,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:45:00,856 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:45:00,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:45:01,060 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:01,061 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:45:01,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash -612037408, now seen corresponding path program 1 times [2024-09-21 11:45:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:45:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889798669] [2024-09-21 11:45:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:45:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:45:01,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46909782] [2024-09-21 11:45:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:01,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:45:01,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:45:01,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:45:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:45:01,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-21 11:45:01,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:45:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:45:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:45:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:45:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:45:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889798669] [2024-09-21 11:45:01,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:45:01,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46909782] [2024-09-21 11:45:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46909782] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:45:01,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:45:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-21 11:45:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440322433] [2024-09-21 11:45:01,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:45:01,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:45:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:45:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:45:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:45:01,650 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-21 11:45:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:01,855 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-09-21 11:45:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:45:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 74 [2024-09-21 11:45:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:01,856 INFO L225 Difference]: With dead ends: 104 [2024-09-21 11:45:01,856 INFO L226 Difference]: Without dead ends: 102 [2024-09-21 11:45:01,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:45:01,857 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:01,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 171 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:45:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-21 11:45:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-09-21 11:45:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-21 11:45:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2024-09-21 11:45:01,891 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 74 [2024-09-21 11:45:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:01,893 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2024-09-21 11:45:01,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-21 11:45:01,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2024-09-21 11:45:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 11:45:01,897 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:45:01,897 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:45:01,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 11:45:02,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:02,102 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:45:02,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1655042001, now seen corresponding path program 1 times [2024-09-21 11:45:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:45:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735493696] [2024-09-21 11:45:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:45:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:45:02,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428367989] [2024-09-21 11:45:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:45:02,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:45:02,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:45:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:45:02,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 11:45:02,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:45:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:45:02,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:45:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:45:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:45:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735493696] [2024-09-21 11:45:02,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:45:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428367989] [2024-09-21 11:45:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428367989] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:45:02,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:45:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-21 11:45:02,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887837383] [2024-09-21 11:45:02,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:45:02,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:45:02,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:45:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:45:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-21 11:45:02,562 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-21 11:45:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:02,906 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-09-21 11:45:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 11:45:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 79 [2024-09-21 11:45:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:02,909 INFO L225 Difference]: With dead ends: 116 [2024-09-21 11:45:02,909 INFO L226 Difference]: Without dead ends: 96 [2024-09-21 11:45:02,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:45:02,910 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:02,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:45:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-21 11:45:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-09-21 11:45:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-21 11:45:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-09-21 11:45:02,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 79 [2024-09-21 11:45:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:02,932 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-09-21 11:45:02,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-21 11:45:02,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-09-21 11:45:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-21 11:45:02,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:45:02,934 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:45:02,946 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 11:45:03,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:03,134 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:45:03,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835968, now seen corresponding path program 2 times [2024-09-21 11:45:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:45:03,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583961325] [2024-09-21 11:45:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:45:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:45:03,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712895064] [2024-09-21 11:45:03,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:45:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:45:03,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:45:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:45:03,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:45:03,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:45:03,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-21 11:45:03,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:45:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-21 11:45:03,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:45:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-21 11:45:04,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:45:04,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583961325] [2024-09-21 11:45:04,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:45:04,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712895064] [2024-09-21 11:45:04,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712895064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:45:04,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:45:04,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-21 11:45:04,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954139332] [2024-09-21 11:45:04,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:45:04,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 11:45:04,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:45:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 11:45:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:45:04,114 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-21 11:45:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:04,644 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-09-21 11:45:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:45:04,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 128 [2024-09-21 11:45:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:04,646 INFO L225 Difference]: With dead ends: 118 [2024-09-21 11:45:04,646 INFO L226 Difference]: Without dead ends: 114 [2024-09-21 11:45:04,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:45:04,647 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:04,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 277 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:45:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-21 11:45:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-09-21 11:45:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-21 11:45:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-09-21 11:45:04,686 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 128 [2024-09-21 11:45:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:04,687 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-09-21 11:45:04,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-21 11:45:04,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-09-21 11:45:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-21 11:45:04,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:45:04,689 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:45:04,703 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:45:04,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 11:45:04,889 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:45:04,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1340142287, now seen corresponding path program 2 times [2024-09-21 11:45:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:45:04,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309661068] [2024-09-21 11:45:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:45:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:45:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:45:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036387886] [2024-09-21 11:45:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:45:04,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:45:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:45:04,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:45:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 11:45:04,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:45:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:45:04,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-21 11:45:04,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:45:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-21 11:45:05,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:45:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 40 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2024-09-21 11:45:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:45:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309661068] [2024-09-21 11:45:05,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:45:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036387886] [2024-09-21 11:45:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036387886] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:45:05,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:45:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2024-09-21 11:45:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484867884] [2024-09-21 11:45:05,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:45:05,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 11:45:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:45:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 11:45:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:45:05,832 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-21 11:45:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:45:06,348 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-09-21 11:45:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:45:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 133 [2024-09-21 11:45:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:45:06,349 INFO L225 Difference]: With dead ends: 126 [2024-09-21 11:45:06,349 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 11:45:06,349 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-09-21 11:45:06,350 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:45:06,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:45:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 11:45:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 11:45:06,351 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) [2024-09-21 11:45:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 11:45:06,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2024-09-21 11:45:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:45:06,351 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 11:45:06,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-21 11:45:06,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:45:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 11:45:06,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 11:45:06,354 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 11:45:06,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-21 11:45:06,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 11:45:06,558 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-09-21 11:45:06,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 11:45:20,482 WARN L293 SmtUtils]: Spent 13.20s on a formula simplification. DAG size of input: 108 DAG size of output: 45 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-21 11:45:22,586 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 11:45:22,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:45:22 BoogieIcfgContainer [2024-09-21 11:45:22,599 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 11:45:22,599 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 11:45:22,599 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 11:45:22,599 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 11:45:22,600 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:44:56" (3/4) ... [2024-09-21 11:45:22,601 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 11:45:22,645 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 11:45:22,646 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 11:45:22,647 INFO L158 Benchmark]: Toolchain (without parser) took 26506.26ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 90.4MB in the beginning and 78.6MB in the end (delta: 11.7MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,647 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 161.5MB. Free memory was 114.9MB in the beginning and 114.8MB in the end (delta: 98.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:45:22,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.61ms. Allocated memory is still 161.5MB. Free memory was 90.2MB in the beginning and 78.4MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.43ms. Allocated memory is still 161.5MB. Free memory was 78.2MB in the beginning and 77.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:45:22,648 INFO L158 Benchmark]: Boogie Preprocessor took 48.26ms. Allocated memory is still 161.5MB. Free memory was 77.2MB in the beginning and 131.8MB in the end (delta: -54.7MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,648 INFO L158 Benchmark]: RCFGBuilder took 293.33ms. Allocated memory is still 161.5MB. Free memory was 131.8MB in the beginning and 118.1MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,648 INFO L158 Benchmark]: TraceAbstraction took 25907.01ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 117.1MB in the beginning and 81.8MB in the end (delta: 35.4MB). Peak memory consumption was 110.9MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,649 INFO L158 Benchmark]: Witness Printer took 46.94ms. Allocated memory is still 203.4MB. Free memory was 80.7MB in the beginning and 78.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:45:22,650 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 161.5MB. Free memory was 114.9MB in the beginning and 114.8MB in the end (delta: 98.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.61ms. Allocated memory is still 161.5MB. Free memory was 90.2MB in the beginning and 78.4MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.43ms. Allocated memory is still 161.5MB. Free memory was 78.2MB in the beginning and 77.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.26ms. Allocated memory is still 161.5MB. Free memory was 77.2MB in the beginning and 131.8MB in the end (delta: -54.7MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * RCFGBuilder took 293.33ms. Allocated memory is still 161.5MB. Free memory was 131.8MB in the beginning and 118.1MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 25907.01ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 117.1MB in the beginning and 81.8MB in the end (delta: 35.4MB). Peak memory consumption was 110.9MB. Max. memory is 16.1GB. * Witness Printer took 46.94ms. Allocated memory is still 203.4MB. Free memory was 80.7MB in the beginning and 78.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.8s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1967 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1539 mSDsCounter, 285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1326 IncrementalHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 285 mSolverCounterUnsat, 428 mSDtfsCounter, 1326 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1264 GetRequests, 1134 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=11, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 1334 NumberOfCodeBlocks, 1304 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1237 ConstructedInterpolants, 0 QuantifiedInterpolants, 4768 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 206 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 5309/5604 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((((__int128) y * 2) == (2 + ((__int128) n * z))) && (((((3 * ((__int128) n * n)) + (((__int128) n * n) * n)) + ((__int128) n * 3)) + 1) == ((__int128) y + x))) && (a <= 100)) && ((((__int128) n * 6) + 6) == z)) && (0 <= a)) && ((n < (a + 1)) || (((__int128) z * x) == (((__int128) x * 12) + (((__int128) a * x) * 6))))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-09-21 11:45:22,668 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