./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.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/prodbin-ll_valuebound20.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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --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 19:42:17,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:42:17,075 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:42:17,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:42:17,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:42:17,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:42:17,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:42:17,112 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:42:17,113 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:42:17,114 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:42:17,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:42:17,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:42:17,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:42:17,116 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:42:17,118 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:42:17,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:42:17,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:42:17,119 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:42:17,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:42:17,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:42:17,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:42:17,124 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:42:17,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:42:17,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:42:17,124 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:42:17,124 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:42:17,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:42:17,125 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:42:17,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:42:17,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:42:17,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:42:17,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:42:17,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:42:17,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:42:17,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:42:17,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:42:17,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:42:17,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:42:17,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:42:17,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:42:17,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:42:17,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:42:17,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:42:17,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:42:17,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:42:17,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:42:17,426 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:42:17,426 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:42:17,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-20 19:42:18,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:42:19,058 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:42:19,058 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-20 19:42:19,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7afc3ce32/14f94c5b04204719a2739cc2c3477a93/FLAGbde6014b8 [2024-09-20 19:42:19,101 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7afc3ce32/14f94c5b04204719a2739cc2c3477a93 [2024-09-20 19:42:19,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:42:19,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:42:19,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:42:19,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:42:19,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:42:19,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d004e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19, skipping insertion in model container [2024-09-20 19:42:19,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,164 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:42:19,331 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/prodbin-ll_valuebound20.c[537,550] [2024-09-20 19:42:19,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:42:19,356 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:42:19,370 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/prodbin-ll_valuebound20.c[537,550] [2024-09-20 19:42:19,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:42:19,396 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:42:19,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19 WrapperNode [2024-09-20 19:42:19,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:42:19,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:42:19,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:42:19,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:42:19,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,418 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:42:19,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:42:19,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:42:19,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:42:19,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:42:19,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,441 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 19:42:19,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,444 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:42:19,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:42:19,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:42:19,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:42:19,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (1/1) ... [2024-09-20 19:42:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:42:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:19,492 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 19:42:19,494 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 19:42:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:42:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:42:19,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:42:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:42:19,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:42:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:42:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:42:19,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:42:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:42:19,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:42:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:42:19,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:42:19,580 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:42:19,581 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:42:19,710 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:42:19,712 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:42:19,742 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:42:19,742 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:42:19,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:19 BoogieIcfgContainer [2024-09-20 19:42:19,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:42:19,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:42:19,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:42:19,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:42:19,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:42:19" (1/3) ... [2024-09-20 19:42:19,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e678644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:42:19, skipping insertion in model container [2024-09-20 19:42:19,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:19" (2/3) ... [2024-09-20 19:42:19,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e678644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:42:19, skipping insertion in model container [2024-09-20 19:42:19,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:19" (3/3) ... [2024-09-20 19:42:19,752 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2024-09-20 19:42:19,772 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:42:19,772 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:42:19,832 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:42:19,839 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;@2ff4f827, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:42:19,840 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:42:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:42:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:42:19,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:19,855 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:19,855 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:19,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-20 19:42:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992489090] [2024-09-20 19:42:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:19,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992489090] [2024-09-20 19:42:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992489090] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:42:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:42:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:42:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340126095] [2024-09-20 19:42:20,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:20,058 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:42:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:42:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:42:20,085 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:42:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:20,114 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-20 19:42:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:42:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-20 19:42:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:20,122 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:42:20,122 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 19:42:20,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:42:20,128 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:20,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:42:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 19:42:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-20 19:42:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:42:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 19:42:20,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-20 19:42:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:20,164 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 19:42:20,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:42:20,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 19:42:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:42:20,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:20,167 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:20,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:42:20,168 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:20,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-20 19:42:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437824431] [2024-09-20 19:42:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:20,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146960421] [2024-09-20 19:42:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:20,209 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 19:42:20,218 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 19:42:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:20,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:42:20,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:20,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:20,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:20,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437824431] [2024-09-20 19:42:20,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146960421] [2024-09-20 19:42:20,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146960421] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:20,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:42:20,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-20 19:42:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359105960] [2024-09-20 19:42:20,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:20,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:42:20,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:42:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:42:20,648 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:42:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:20,766 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-20 19:42:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:42:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-20 19:42:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:20,768 INFO L225 Difference]: With dead ends: 37 [2024-09-20 19:42:20,768 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:42:20,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:20,770 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:20,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:42:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-20 19:42:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:42:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 19:42:20,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-20 19:42:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:20,788 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 19:42:20,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:42:20,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 19:42:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 19:42:20,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:20,792 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:20,809 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 19:42:20,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:20,993 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:20,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-20 19:42:20,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589055754] [2024-09-20 19:42:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:42:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:21,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589055754] [2024-09-20 19:42:21,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589055754] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:42:21,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:42:21,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 19:42:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280182057] [2024-09-20 19:42:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:21,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:42:21,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:42:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:42:21,250 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:21,329 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-20 19:42:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:42:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-20 19:42:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:21,331 INFO L225 Difference]: With dead ends: 42 [2024-09-20 19:42:21,331 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:42:21,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:42:21,334 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:21,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:42:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-20 19:42:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:42:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-20 19:42:21,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-20 19:42:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:21,347 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-20 19:42:21,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:21,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-20 19:42:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:42:21,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:21,349 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:21,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 19:42:21,350 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:21,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-20 19:42:21,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:21,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447387340] [2024-09-20 19:42:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:21,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365049453] [2024-09-20 19:42:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:21,402 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 19:42:21,404 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 19:42:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:21,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:42:21,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:21,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:23,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:23,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447387340] [2024-09-20 19:42:23,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:23,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365049453] [2024-09-20 19:42:23,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365049453] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:23,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:42:23,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-20 19:42:23,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089296419] [2024-09-20 19:42:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:23,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:42:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:42:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:23,719 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:23,894 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-20 19:42:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:42:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-20 19:42:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:23,896 INFO L225 Difference]: With dead ends: 45 [2024-09-20 19:42:23,896 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 19:42:23,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:42:23,898 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:23,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 19:42:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-20 19:42:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:42:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-20 19:42:23,908 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-20 19:42:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:23,908 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-20 19:42:23,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-20 19:42:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:42:23,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:23,910 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:23,928 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 19:42:24,111 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:24,111 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:24,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-20 19:42:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649909782] [2024-09-20 19:42:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130258318] [2024-09-20 19:42:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:24,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:24,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:24,148 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 19:42:24,150 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 19:42:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:42:24,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:24,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:25,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649909782] [2024-09-20 19:42:25,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130258318] [2024-09-20 19:42:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130258318] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:25,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-20 19:42:25,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626561554] [2024-09-20 19:42:25,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:25,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:42:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:42:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:42:25,182 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:42:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:25,812 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-20 19:42:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:42:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-20 19:42:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:25,815 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:42:25,815 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:42:25,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-20 19:42:25,817 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:25,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:42:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:42:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 19:42:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:42:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-20 19:42:25,835 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-20 19:42:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:25,835 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-20 19:42:25,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:42:25,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-20 19:42:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 19:42:25,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:25,837 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:25,854 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 19:42:26,041 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,042 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:26,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-20 19:42:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:26,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62010294] [2024-09-20 19:42:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:26,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172020881] [2024-09-20 19:42:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:26,066 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 19:42:26,068 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 19:42:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:26,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:42:26,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:42:26,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:42:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:26,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62010294] [2024-09-20 19:42:26,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:26,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172020881] [2024-09-20 19:42:26,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172020881] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:26,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:26,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-20 19:42:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042750352] [2024-09-20 19:42:26,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:26,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:42:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:42:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:42:26,250 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:42:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:26,333 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 19:42:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:42:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-20 19:42:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:26,335 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:42:26,335 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:42:26,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:26,336 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:26,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:42:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 19:42:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:42:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-20 19:42:26,359 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-20 19:42:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:26,360 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-20 19:42:26,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:42:26,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-20 19:42:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 19:42:26,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:26,363 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:26,382 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:42:26,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,568 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:26,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-20 19:42:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:26,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538392511] [2024-09-20 19:42:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913781344] [2024-09-20 19:42:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:26,613 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 19:42:26,633 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 19:42:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:26,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 19:42:26,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:42:27,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:42:34,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538392511] [2024-09-20 19:42:34,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913781344] [2024-09-20 19:42:34,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913781344] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:34,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:34,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-20 19:42:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165216111] [2024-09-20 19:42:34,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:34,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:42:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:42:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:42:34,543 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:42:39,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:42:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:41,656 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-20 19:42:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:42:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-20 19:42:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:41,658 INFO L225 Difference]: With dead ends: 90 [2024-09-20 19:42:41,658 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 19:42:41,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:42:41,659 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:41,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-20 19:42:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 19:42:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-20 19:42:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:42:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-20 19:42:41,684 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-20 19:42:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:41,685 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-20 19:42:41,685 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:42:41,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-20 19:42:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:42:41,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:41,686 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:41,703 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:42:41,887 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:42:41,887 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:41,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-20 19:42:41,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52422414] [2024-09-20 19:42:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:41,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755376018] [2024-09-20 19:42:41,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:42:41,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:41,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:41,957 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:42:42,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:42:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:42:42,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 19:42:42,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 19:42:43,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 19:42:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52422414] [2024-09-20 19:42:53,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755376018] [2024-09-20 19:42:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755376018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:53,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:53,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 31 [2024-09-20 19:42:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46293928] [2024-09-20 19:42:53,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:53,459 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 19:42:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 19:42:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:42:53,461 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 19:43:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:43:06,916 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2024-09-20 19:43:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:43:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 63 [2024-09-20 19:43:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:43:06,918 INFO L225 Difference]: With dead ends: 123 [2024-09-20 19:43:06,918 INFO L226 Difference]: Without dead ends: 96 [2024-09-20 19:43:06,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:43:06,920 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:43:06,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 284 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 521 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2024-09-20 19:43:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-20 19:43:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-09-20 19:43:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.144927536231884) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:43:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-09-20 19:43:06,957 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 63 [2024-09-20 19:43:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:43:06,958 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-09-20 19:43:06,958 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 19:43:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:43:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-09-20 19:43:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 19:43:06,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:43:06,963 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:43:06,977 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 19:43:07,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:43:07,164 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:43:07,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:43:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 988892572, now seen corresponding path program 3 times [2024-09-20 19:43:07,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:43:07,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206665088] [2024-09-20 19:43:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:43:07,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:43:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:43:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:43:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:43:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:43:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:43:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:43:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 19:43:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:43:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 19:43:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 69 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 19:43:08,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:43:08,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206665088] [2024-09-20 19:43:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206665088] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:43:08,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027626214] [2024-09-20 19:43:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:43:08,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:43:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:43:08,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:43:08,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:43:08,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 19:43:08,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:43:08,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 19:43:08,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:43:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 19:43:11,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:43:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 19:43:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027626214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:43:17,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:43:17,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 15] total 42 [2024-09-20 19:43:17,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470825960] [2024-09-20 19:43:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:43:17,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 19:43:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:43:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 19:43:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 19:43:17,838 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-20 19:43:42,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 19:43:46,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 19:44:07,631 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 [1] [2024-09-20 19:44:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:11,672 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2024-09-20 19:44:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-20 19:44:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) Word has length 72 [2024-09-20 19:44:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:11,674 INFO L225 Difference]: With dead ends: 215 [2024-09-20 19:44:11,674 INFO L226 Difference]: Without dead ends: 110 [2024-09-20 19:44:11,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=1559, Invalid=6995, Unknown=2, NotChecked=0, Total=8556 [2024-09-20 19:44:11,677 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:11,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 516 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 869 Invalid, 3 Unknown, 0 Unchecked, 19.1s Time] [2024-09-20 19:44:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-20 19:44:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-09-20 19:44:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 79 states have internal predecessors, (79), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 19:44:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2024-09-20 19:44:11,745 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 72 [2024-09-20 19:44:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:11,745 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2024-09-20 19:44:11,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-20 19:44:11,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2024-09-20 19:44:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 19:44:11,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:11,750 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:11,763 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:44:11,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:11,951 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:11,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1255090726, now seen corresponding path program 2 times [2024-09-20 19:44:11,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:11,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449316467] [2024-09-20 19:44:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:44:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:44:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:44:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:44:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:44:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:44:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 19:44:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:44:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 19:44:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 19:44:12,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449316467] [2024-09-20 19:44:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449316467] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:44:12,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61397712] [2024-09-20 19:44:12,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:44:12,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:12,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:12,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:44:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:44:12,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:44:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:44:12,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 19:44:12,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 19:44:13,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 19:44:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61397712] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:44:14,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:44:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2024-09-20 19:44:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237773468] [2024-09-20 19:44:14,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:44:14,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 19:44:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 19:44:14,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 19:44:14,175 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2024-09-20 19:44:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:14,568 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-09-20 19:44:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:44:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) Word has length 72 [2024-09-20 19:44:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:14,570 INFO L225 Difference]: With dead ends: 111 [2024-09-20 19:44:14,570 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:44:14,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 19:44:14,572 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:14,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 151 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:44:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:44:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:44:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:44:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:44:14,573 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2024-09-20 19:44:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:14,574 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:44:14,574 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2024-09-20 19:44:14,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:44:14,575 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:44:14,577 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:44:14,593 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:44:14,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:14,783 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2024-09-20 19:44:14,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:44:24,447 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:44:24,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:44:24 BoogieIcfgContainer [2024-09-20 19:44:24,472 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:44:24,473 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:44:24,473 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:44:24,473 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:44:24,474 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:19" (3/4) ... [2024-09-20 19:44:24,476 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:44:24,534 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:44:24,534 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:44:24,535 INFO L158 Benchmark]: Toolchain (without parser) took 125427.00ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 132.0MB in the beginning and 102.8MB in the end (delta: 29.2MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,535 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 159.4MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:44:24,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.55ms. Allocated memory is still 159.4MB. Free memory was 132.0MB in the beginning and 120.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,536 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.04ms. Allocated memory is still 159.4MB. Free memory was 120.5MB in the beginning and 119.8MB in the end (delta: 646.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:44:24,536 INFO L158 Benchmark]: Boogie Preprocessor took 40.28ms. Allocated memory is still 159.4MB. Free memory was 119.8MB in the beginning and 117.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,537 INFO L158 Benchmark]: RCFGBuilder took 283.18ms. Allocated memory is still 159.4MB. Free memory was 117.7MB in the beginning and 105.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,537 INFO L158 Benchmark]: TraceAbstraction took 124727.30ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 104.5MB in the beginning and 104.9MB in the end (delta: -372.0kB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,537 INFO L158 Benchmark]: Witness Printer took 61.66ms. Allocated memory is still 192.9MB. Free memory was 104.9MB in the beginning and 102.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:44:24,539 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 159.4MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.55ms. Allocated memory is still 159.4MB. Free memory was 132.0MB in the beginning and 120.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.04ms. Allocated memory is still 159.4MB. Free memory was 120.5MB in the beginning and 119.8MB in the end (delta: 646.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.28ms. Allocated memory is still 159.4MB. Free memory was 119.8MB in the beginning and 117.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.18ms. Allocated memory is still 159.4MB. Free memory was 117.7MB in the beginning and 105.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 124727.30ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 104.5MB in the beginning and 104.9MB in the end (delta: -372.0kB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. * Witness Printer took 61.66ms. Allocated memory is still 192.9MB. Free memory was 104.9MB in the beginning and 102.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 115.0s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 76.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 30.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 322 mSDsluCounter, 1739 SdHoareTripleChecker+Invalid, 30.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1494 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2257 IncrementalHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 245 mSDtfsCounter, 2257 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 690 SyntacticMatches, 24 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 64.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=9, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 846 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 970 ConstructedInterpolants, 14 QuantifiedInterpolants, 10048 SizeOfPredicates, 14 NumberOfNonLiveVariables, 929 ConjunctsInSsa, 231 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 875/1114 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: 34]: Loop Invariant Derived loop invariant: (((((((((((0 <= y) && ((z + ((__int128) y * x)) == ((long long) b * a))) && (a <= 20)) && (y <= 4)) && (b <= 20)) && (0 <= a)) && (1 <= b)) || (((((((z == 0) && (a <= 20)) && (b == y)) && (0 <= a)) && (y <= 20)) && (1 <= y)) && (a == x))) || ((((((((z == 0) && (y == (b / 2))) && (a <= 20)) && (b <= 20)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y))) || ((((((((z == 0) && (((__int128) y * x) == ((long long) b * a))) && (a <= 20)) && (b <= 20)) && (0 <= a)) && (1 <= b)) && (1 <= y)) && (y <= 5))) || ((((((((1 <= (b % 2)) && (a <= 20)) && (b <= 20)) && (((long long) a * 2) == x)) && (0 <= a)) && (x == ((__int128) z * 2))) && (1 <= b)) && ((((long long) -1 + b) / 2) == y))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:44:24,755 WARN L435 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-09-20 19:44:24,805 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE