./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.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 ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:07:24,132 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:07:24,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:07:24,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:07:24,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:07:24,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:07:24,239 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:07:24,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:07:24,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:07:24,242 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:07:24,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:07:24,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:07:24,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:07:24,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:07:24,248 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:07:24,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:07:24,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:07:24,249 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:07:24,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:07:24,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:07:24,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:07:24,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:07:24,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:07:24,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:07:24,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:07:24,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:07:24,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:07:24,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:07:24,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:07:24,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:07:24,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:07:24,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:07:24,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:24,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:07:24,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:07:24,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:07:24,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:07:24,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:07:24,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:07:24,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:07:24,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:07:24,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:07:24,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:07:24,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:07:24,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:07:24,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:07:24,538 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:07:24,539 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:07:24,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2024-09-20 19:07:25,986 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:07:26,139 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:07:26,139 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2024-09-20 19:07:26,145 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/130797b0b/2fdb4b1b38ca43618c100c929aa84b3d/FLAGc4d3fc172 [2024-09-20 19:07:26,156 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/130797b0b/2fdb4b1b38ca43618c100c929aa84b3d [2024-09-20 19:07:26,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:07:26,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:07:26,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:26,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:07:26,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:07:26,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5031cc7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26, skipping insertion in model container [2024-09-20 19:07:26,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,185 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:07:26,334 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/dijkstra-u_unwindbound2.c[525,538] [2024-09-20 19:07:26,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:26,394 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:07:26,413 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/dijkstra-u_unwindbound2.c[525,538] [2024-09-20 19:07:26,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:26,446 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:07:26,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26 WrapperNode [2024-09-20 19:07:26,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:26,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:26,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:07:26,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:07:26,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,471 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:07:26,472 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:26,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:07:26,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:07:26,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:07:26,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,508 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:07:26,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:07:26,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:07:26,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:07:26,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:07:26,533 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (1/1) ... [2024-09-20 19:07:26,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:26,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:26,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 19:07:26,565 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 19:07:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:07:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:07:26,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:07:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:07:26,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:07:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:07:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:07:26,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:07:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:07:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:07:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:07:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:07:26,674 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:07:26,676 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:07:26,913 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:07:26,913 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:07:26,956 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:07:26,957 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:07:26,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:26 BoogieIcfgContainer [2024-09-20 19:07:26,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:07:26,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:07:26,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:07:26,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:07:26,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:07:26" (1/3) ... [2024-09-20 19:07:26,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b5ca88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:26, skipping insertion in model container [2024-09-20 19:07:26,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:26" (2/3) ... [2024-09-20 19:07:26,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b5ca88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:26, skipping insertion in model container [2024-09-20 19:07:26,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:26" (3/3) ... [2024-09-20 19:07:26,969 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.c [2024-09-20 19:07:26,999 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:07:26,999 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:07:27,046 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:07:27,051 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;@25b86185, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:07:27,051 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:07:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:07:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 19:07:27,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:27,064 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:27,066 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2032653734, now seen corresponding path program 1 times [2024-09-20 19:07:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:27,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006730284] [2024-09-20 19:07:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:27,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006730284] [2024-09-20 19:07:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006730284] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:27,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:27,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 19:07:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985658520] [2024-09-20 19:07:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:27,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 19:07:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 19:07:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:27,281 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:27,460 INFO L93 Difference]: Finished difference Result 67 states and 108 transitions. [2024-09-20 19:07:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 19:07:27,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 17 [2024-09-20 19:07:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:27,469 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:07:27,470 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:07:27,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:27,476 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:27,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:07:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:07:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-09-20 19:07:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:07:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2024-09-20 19:07:27,518 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 17 [2024-09-20 19:07:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:27,518 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2024-09-20 19:07:27,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:27,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2024-09-20 19:07:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 19:07:27,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:27,521 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:27,521 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:07:27,521 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:27,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1118840531, now seen corresponding path program 1 times [2024-09-20 19:07:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728635754] [2024-09-20 19:07:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728635754] [2024-09-20 19:07:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728635754] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:27,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:27,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478871234] [2024-09-20 19:07:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:27,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:27,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:27,746 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:27,878 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2024-09-20 19:07:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:27,879 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-20 19:07:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:27,880 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:07:27,880 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:07:27,881 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 [2024-09-20 19:07:27,882 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:27,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:07:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 19:07:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:07:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2024-09-20 19:07:27,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2024-09-20 19:07:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:27,893 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2024-09-20 19:07:27,893 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:27,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2024-09-20 19:07:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 19:07:27,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:27,894 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:27,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:07:27,895 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:27,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash -668930339, now seen corresponding path program 1 times [2024-09-20 19:07:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592716578] [2024-09-20 19:07:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592716578] [2024-09-20 19:07:28,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592716578] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:28,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:28,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:07:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006432457] [2024-09-20 19:07:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:28,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:07:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:07:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:07:28,073 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:28,238 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-20 19:07:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:07:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-20 19:07:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:28,240 INFO L225 Difference]: With dead ends: 48 [2024-09-20 19:07:28,240 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 19:07:28,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:07:28,242 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:28,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 19:07:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-20 19:07:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:07:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2024-09-20 19:07:28,255 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 20 [2024-09-20 19:07:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:28,255 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-09-20 19:07:28,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2024-09-20 19:07:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 19:07:28,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:28,256 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:28,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 19:07:28,257 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:28,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -667440789, now seen corresponding path program 1 times [2024-09-20 19:07:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159139646] [2024-09-20 19:07:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:28,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159139646] [2024-09-20 19:07:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159139646] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:28,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:28,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:07:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100802982] [2024-09-20 19:07:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:28,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:07:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:07:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:07:28,567 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:32,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:07:37,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:07:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:37,577 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2024-09-20 19:07:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:07:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 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 20 [2024-09-20 19:07:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:37,579 INFO L225 Difference]: With dead ends: 68 [2024-09-20 19:07:37,579 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 19:07:37,579 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:07:37,580 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:37,580 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 122 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2024-09-20 19:07:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 19:07:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 19:07:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:07:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2024-09-20 19:07:37,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 20 [2024-09-20 19:07:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:37,603 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2024-09-20 19:07:37,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:37,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2024-09-20 19:07:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:07:37,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:37,605 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, 1] [2024-09-20 19:07:37,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 19:07:37,605 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:37,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1425403934, now seen corresponding path program 1 times [2024-09-20 19:07:37,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:37,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523414333] [2024-09-20 19:07:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:37,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:37,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:37,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523414333] [2024-09-20 19:07:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523414333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203939300] [2024-09-20 19:07:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:37,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:37,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:37,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:37,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:07:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:37,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:37,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:37,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203939300] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:07:37,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:07:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2024-09-20 19:07:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24985879] [2024-09-20 19:07:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:07:37,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:07:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:07:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:07:37,902 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:07:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:38,104 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2024-09-20 19:07:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:07:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2024-09-20 19:07:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:38,106 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:07:38,107 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:07:38,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:07:38,108 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:38,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:07:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:07:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 19:07:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:07:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-20 19:07:38,121 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 22 [2024-09-20 19:07:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:38,122 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-20 19:07:38,122 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:07:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-20 19:07:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 19:07:38,123 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:38,123 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:38,140 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:07:38,324 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:38,324 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:38,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1582461240, now seen corresponding path program 1 times [2024-09-20 19:07:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:38,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989349311] [2024-09-20 19:07:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091579170] [2024-09-20 19:07:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:38,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:38,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:38,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:38,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:07:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:38,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:38,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:07:38,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:38,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:38,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989349311] [2024-09-20 19:07:38,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091579170] [2024-09-20 19:07:38,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091579170] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:38,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183643709] [2024-09-20 19:07:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:38,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:38,485 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 19:07:40,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:07:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:40,991 INFO L93 Difference]: Finished difference Result 69 states and 96 transitions. [2024-09-20 19:07:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2024-09-20 19:07:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:40,993 INFO L225 Difference]: With dead ends: 69 [2024-09-20 19:07:40,993 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 19:07:40,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:40,994 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:40,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-20 19:07:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 19:07:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-20 19:07:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 36 states have internal predecessors, (43), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 19:07:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2024-09-20 19:07:41,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 23 [2024-09-20 19:07:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:41,010 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2024-09-20 19:07:41,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 19:07:41,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2024-09-20 19:07:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 19:07:41,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:41,012 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:41,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:07:41,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:07:41,213 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1580971690, now seen corresponding path program 1 times [2024-09-20 19:07:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268390790] [2024-09-20 19:07:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:41,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:41,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:41,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:41,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268390790] [2024-09-20 19:07:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268390790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172782279] [2024-09-20 19:07:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:41,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:07:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:41,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:07:41,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:41,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:41,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172782279] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:41,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:41,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2024-09-20 19:07:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933205822] [2024-09-20 19:07:41,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:41,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:07:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:07:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:07:41,426 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:41,516 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2024-09-20 19:07:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-20 19:07:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:41,518 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:07:41,518 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 19:07:41,519 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:07:41,519 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:41,520 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 87 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 19:07:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-20 19:07:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:07:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-09-20 19:07:41,537 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2024-09-20 19:07:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:41,539 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-09-20 19:07:41,539 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-09-20 19:07:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 19:07:41,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:41,542 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, 1, 1, 1, 1] [2024-09-20 19:07:41,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:07:41,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:07:41,743 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:41,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash -508797286, now seen corresponding path program 1 times [2024-09-20 19:07:41,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:41,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629362963] [2024-09-20 19:07:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490780730] [2024-09-20 19:07:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:41,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:41,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:07:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:41,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:07:41,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:41,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:41,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629362963] [2024-09-20 19:07:41,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490780730] [2024-09-20 19:07:41,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490780730] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:41,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:41,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 19:07:41,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015998435] [2024-09-20 19:07:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:41,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:07:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:07:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:41,944 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-09-20 19:07:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:42,041 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-09-20 19:07:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 25 [2024-09-20 19:07:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:42,043 INFO L225 Difference]: With dead ends: 56 [2024-09-20 19:07:42,043 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 19:07:42,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:07:42,045 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:42,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 19:07:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-20 19:07:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:07:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2024-09-20 19:07:42,062 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 25 [2024-09-20 19:07:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:42,063 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2024-09-20 19:07:42,063 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-09-20 19:07:42,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2024-09-20 19:07:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 19:07:42,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:42,064 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:42,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:07:42,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:42,265 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:42,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:42,265 INFO L85 PathProgramCache]: Analyzing trace with hash 511629789, now seen corresponding path program 1 times [2024-09-20 19:07:42,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:42,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471866746] [2024-09-20 19:07:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:42,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710458119] [2024-09-20 19:07:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:42,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:42,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:42,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:07:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:42,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:42,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:07:42,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:42,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471866746] [2024-09-20 19:07:42,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710458119] [2024-09-20 19:07:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710458119] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:42,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:42,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:42,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466366534] [2024-09-20 19:07:42,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:42,388 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:42,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:42,389 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-09-20 19:07:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:42,462 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2024-09-20 19:07:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 28 [2024-09-20 19:07:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:42,463 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:07:42,463 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:07:42,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:42,464 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:42,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:07:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:07:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:07:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:07:42,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2024-09-20 19:07:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:42,465 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:07:42,465 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-09-20 19:07:42,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:07:42,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:07:42,472 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:07:42,490 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:42,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:42,677 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:42,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:07:43,546 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:07:43,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:07:43 BoogieIcfgContainer [2024-09-20 19:07:43,568 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:07:43,568 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:07:43,569 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:07:43,569 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:07:43,570 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:26" (3/4) ... [2024-09-20 19:07:43,572 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:07:43,627 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:07:43,628 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:07:43,628 INFO L158 Benchmark]: Toolchain (without parser) took 17468.79ms. Allocated memory was 157.3MB in the beginning and 199.2MB in the end (delta: 41.9MB). Free memory was 99.2MB in the beginning and 60.3MB in the end (delta: 38.9MB). Peak memory consumption was 83.0MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,628 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:43,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.83ms. Allocated memory is still 157.3MB. Free memory was 99.2MB in the beginning and 85.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.69ms. Allocated memory is still 157.3MB. Free memory was 85.6MB in the beginning and 84.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,629 INFO L158 Benchmark]: Boogie Preprocessor took 55.35ms. Allocated memory is still 157.3MB. Free memory was 84.5MB in the beginning and 82.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,630 INFO L158 Benchmark]: RCFGBuilder took 424.99ms. Allocated memory is still 157.3MB. Free memory was 82.4MB in the beginning and 126.8MB in the end (delta: -44.4MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,630 INFO L158 Benchmark]: TraceAbstraction took 16604.76ms. Allocated memory was 157.3MB in the beginning and 199.2MB in the end (delta: 41.9MB). Free memory was 126.1MB in the beginning and 62.4MB in the end (delta: 63.7MB). Peak memory consumption was 106.2MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,631 INFO L158 Benchmark]: Witness Printer took 59.66ms. Allocated memory is still 199.2MB. Free memory was 62.4MB in the beginning and 60.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:43,632 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.83ms. Allocated memory is still 157.3MB. Free memory was 99.2MB in the beginning and 85.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.69ms. Allocated memory is still 157.3MB. Free memory was 85.6MB in the beginning and 84.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.35ms. Allocated memory is still 157.3MB. Free memory was 84.5MB in the beginning and 82.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.99ms. Allocated memory is still 157.3MB. Free memory was 82.4MB in the beginning and 126.8MB in the end (delta: -44.4MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * TraceAbstraction took 16604.76ms. Allocated memory was 157.3MB in the beginning and 199.2MB in the end (delta: 41.9MB). Free memory was 126.1MB in the beginning and 62.4MB in the end (delta: 63.7MB). Peak memory consumption was 106.2MB. Max. memory is 16.1GB. * Witness Printer took 59.66ms. Allocated memory is still 199.2MB. Free memory was 62.4MB in the beginning and 60.3MB 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: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.6s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 141 SdHoareTripleChecker+Valid, 12.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 940 SdHoareTripleChecker+Invalid, 12.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 632 mSDsCounter, 106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 560 IncrementalHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 106 mSolverCounterUnsat, 308 mSDtfsCounter, 560 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 318 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 734 SizeOfPredicates, 8 NumberOfNonLiveVariables, 409 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 14/22 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: 38]: Loop Invariant Derived loop invariant: ((((((((p == 0) && (n == r)) && (n <= 0)) && (counter == 1)) && (h == 0)) && (q == 1)) || ((((2 <= counter) && (p == 0)) && (n == r)) && (h == 0))) && (\old(counter) == 0)) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((\old(counter) == 0) && ((((((p == 0) && (n == r)) && (counter == 1)) && (h == 0)) || (((((p == 0) && (n == r)) && (counter == 0)) && (h == 0)) && (q == 1))) || ((((2 <= counter) && (p == 0)) && (n == r)) && (h == 0)))) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Requires: (counter == 0) Ensures: (counter == 0) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:07:43,660 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