./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.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 bd4ff7f95c7aab1abb3428488ee9247a9f3cbeb30d436182472263a0c2dcf758 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:22:24,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:22:24,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:22:24,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:22:24,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:22:24,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:22:24,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:22:24,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:22:24,143 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:22:24,144 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:22:24,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:22:24,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:22:24,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:22:24,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:22:24,147 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:22:24,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:22:24,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:22:24,148 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:22:24,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:22:24,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:22:24,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:22:24,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:22:24,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:22:24,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:22:24,152 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:22:24,153 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:22:24,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:22:24,153 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:22:24,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:22:24,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:22:24,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:22:24,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:22:24,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:22:24,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:22:24,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:22:24,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:22:24,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:22:24,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:22:24,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:22:24,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:22:24,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:22:24,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:22:24,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd4ff7f95c7aab1abb3428488ee9247a9f3cbeb30d436182472263a0c2dcf758 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:22:24,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:22:24,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:22:24,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:22:24,489 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:22:24,490 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:22:24,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c [2024-09-21 12:22:25,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:22:26,105 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:22:26,106 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c [2024-09-21 12:22:26,113 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/377df43b5/ac5630e71bb74c0392d710a157746d67/FLAG81db51625 [2024-09-21 12:22:26,136 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/377df43b5/ac5630e71bb74c0392d710a157746d67 [2024-09-21 12:22:26,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:22:26,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:22:26,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:22:26,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:22:26,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:22:26,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,154 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ed8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26, skipping insertion in model container [2024-09-21 12:22:26,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:22:26,318 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/ps5-ll_valuebound1.c[458,471] [2024-09-21 12:22:26,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:22:26,344 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:22:26,353 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/ps5-ll_valuebound1.c[458,471] [2024-09-21 12:22:26,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:22:26,379 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:22:26,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26 WrapperNode [2024-09-21 12:22:26,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:22:26,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:22:26,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:22:26,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:22:26,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,410 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:22:26,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:22:26,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:22:26,412 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:22:26,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:22:26,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,450 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 12:22:26,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,457 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,460 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:22:26,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:22:26,461 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:22:26,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:22:26,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (1/1) ... [2024-09-21 12:22:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:22:26,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:22:26,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:22:26,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:22:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:22:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:22:26,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:22:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:22:26,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:22:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:22:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:22:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:22:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:22:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:22:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:22:26,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:22:26,625 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:22:26,627 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:22:26,772 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 12:22:26,773 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:22:26,811 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:22:26,811 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:22:26,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:22:26 BoogieIcfgContainer [2024-09-21 12:22:26,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:22:26,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:22:26,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:22:26,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:22:26,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:22:26" (1/3) ... [2024-09-21 12:22:26,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff4b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:22:26, skipping insertion in model container [2024-09-21 12:22:26,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:26" (2/3) ... [2024-09-21 12:22:26,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff4b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:22:26, skipping insertion in model container [2024-09-21 12:22:26,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:22:26" (3/3) ... [2024-09-21 12:22:26,828 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound1.c [2024-09-21 12:22:26,871 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:22:26,872 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:22:26,920 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:22:26,926 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;@7c6bb5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:22:26,926 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:22:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2024-09-21 12:22:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 12:22:26,945 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:22:26,945 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:22:26,946 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:22:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -620791457, now seen corresponding path program 1 times [2024-09-21 12:22:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:22:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387046062] [2024-09-21 12:22:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:22:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:22:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:22:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:22:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:22:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:22:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387046062] [2024-09-21 12:22:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387046062] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:22:27,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:22:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 12:22:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722753001] [2024-09-21 12:22:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:22:27,189 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 12:22:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:22:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 12:22:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:22:27,217 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:22:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:22:27,248 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-09-21 12:22:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 12:22:27,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-21 12:22:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:22:27,258 INFO L225 Difference]: With dead ends: 48 [2024-09-21 12:22:27,258 INFO L226 Difference]: Without dead ends: 23 [2024-09-21 12:22:27,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:22:27,267 INFO L434 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:22:27,268 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:22:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-21 12:22:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-21 12:22:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2024-09-21 12:22:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-21 12:22:27,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2024-09-21 12:22:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:22:27,305 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-21 12:22:27,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:22:27,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-21 12:22:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 12:22:27,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:22:27,308 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:22:27,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:22:27,308 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:22:27,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -959298087, now seen corresponding path program 1 times [2024-09-21 12:22:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:22:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649658350] [2024-09-21 12:22:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:22:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:22:27,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281446648] [2024-09-21 12:22:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:27,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:22:27,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:22:27,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:22:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 12:22:27,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:22:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:22:27,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:22:27,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:22:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649658350] [2024-09-21 12:22:27,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:22:27,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281446648] [2024-09-21 12:22:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281446648] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:22:27,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:22:27,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:22:27,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975472461] [2024-09-21 12:22:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:22:27,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:22:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:22:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:22:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:22:27,554 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:22:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:22:27,626 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-09-21 12:22:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:22:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-09-21 12:22:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:22:27,627 INFO L225 Difference]: With dead ends: 34 [2024-09-21 12:22:27,627 INFO L226 Difference]: Without dead ends: 30 [2024-09-21 12:22:27,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:22:27,629 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:22:27,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:22:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-21 12:22:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-21 12:22:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 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) [2024-09-21 12:22:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-21 12:22:27,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2024-09-21 12:22:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:22:27,647 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-21 12:22:27,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:22:27,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-21 12:22:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:22:27,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:22:27,651 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:22:27,669 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:22:27,852 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 [2024-09-21 12:22:27,852 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:22:27,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1544704875, now seen corresponding path program 1 times [2024-09-21 12:22:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:22:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620598884] [2024-09-21 12:22:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:22:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:22:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982005787] [2024-09-21 12:22:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:27,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:22:27,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:22:27,899 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:22:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:27,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 12:22:27,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:22:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:22:28,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:22:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:22:28,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:22:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620598884] [2024-09-21 12:22:28,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:22:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982005787] [2024-09-21 12:22:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982005787] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:22:28,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:22:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-21 12:22:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284349516] [2024-09-21 12:22:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:22:28,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:22:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:22:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:22:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 12:22:28,203 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:22:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:22:28,265 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-09-21 12:22:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:22:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-21 12:22:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:22:28,268 INFO L225 Difference]: With dead ends: 36 [2024-09-21 12:22:28,269 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 12:22:28,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:22:28,271 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:22:28,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:22:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 12:22:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-21 12:22:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:22:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-09-21 12:22:28,287 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2024-09-21 12:22:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:22:28,288 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-09-21 12:22:28,288 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:22:28,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-09-21 12:22:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-21 12:22:28,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:22:28,289 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:22:28,304 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 12:22:28,493 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:28,494 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:22:28,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:28,494 INFO L85 PathProgramCache]: Analyzing trace with hash 21814286, now seen corresponding path program 1 times [2024-09-21 12:22:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:22:28,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014353186] [2024-09-21 12:22:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:22:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:22:28,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611154292] [2024-09-21 12:22:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:22:28,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:22:28,540 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:22:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:28,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 12:22:28,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:22:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:22:28,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:22:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:22:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:22:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014353186] [2024-09-21 12:22:28,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:22:28,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611154292] [2024-09-21 12:22:28,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611154292] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:22:28,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:22:28,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-21 12:22:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021452798] [2024-09-21 12:22:28,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:22:28,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:22:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:22:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:22:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:22:28,890 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:22:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:22:29,033 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-09-21 12:22:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:22:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2024-09-21 12:22:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:22:29,036 INFO L225 Difference]: With dead ends: 49 [2024-09-21 12:22:29,037 INFO L226 Difference]: Without dead ends: 41 [2024-09-21 12:22:29,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:22:29,038 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:22:29,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 135 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:22:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-21 12:22:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-21 12:22:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-21 12:22:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-21 12:22:29,063 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 39 [2024-09-21 12:22:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:22:29,063 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-21 12:22:29,063 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:22:29,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-21 12:22:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-21 12:22:29,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:22:29,068 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:22:29,085 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:22:29,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:29,271 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:22:29,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -244405920, now seen corresponding path program 2 times [2024-09-21 12:22:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:22:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180850352] [2024-09-21 12:22:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:22:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:22:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:22:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:22:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:22:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:22:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 12:22:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 12:22:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 12:22:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:22:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 12:22:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:22:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-21 12:22:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:22:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180850352] [2024-09-21 12:22:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180850352] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:22:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851722420] [2024-09-21 12:22:29,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:22:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:22:29,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:22:29,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:22:29,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:22:29,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:22:29,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 12:22:29,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:22:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-21 12:22:30,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:22:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-21 12:22:30,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851722420] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:22:30,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:22:30,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-09-21 12:22:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627544739] [2024-09-21 12:22:30,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:22:30,213 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:22:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:22:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:22:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-09-21 12:22:30,215 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-21 12:22:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:22:30,291 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2024-09-21 12:22:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:22:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) Word has length 60 [2024-09-21 12:22:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:22:30,294 INFO L225 Difference]: With dead ends: 47 [2024-09-21 12:22:30,294 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:22:30,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:22:30,295 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:22:30,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 99 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:22:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:22:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:22:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-21 12:22:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:22:30,301 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2024-09-21 12:22:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:22:30,301 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:22:30,302 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-21 12:22:30,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:22:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:22:30,302 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:22:30,307 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:22:30,327 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:22:30,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:22:30,511 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-09-21 12:22:30,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:22:30,994 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:22:31,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:22:31 BoogieIcfgContainer [2024-09-21 12:22:31,015 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 12:22:31,016 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 12:22:31,016 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 12:22:31,016 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 12:22:31,017 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:22:26" (3/4) ... [2024-09-21 12:22:31,019 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 12:22:31,071 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 12:22:31,072 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 12:22:31,073 INFO L158 Benchmark]: Toolchain (without parser) took 4930.33ms. Allocated memory is still 159.4MB. Free memory was 124.3MB in the beginning and 71.6MB in the end (delta: 52.8MB). Peak memory consumption was 51.4MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,073 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 86.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:22:31,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.35ms. Allocated memory is still 159.4MB. Free memory was 124.3MB in the beginning and 113.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,074 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.43ms. Allocated memory is still 159.4MB. Free memory was 112.5MB in the beginning and 111.7MB in the end (delta: 730.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,075 INFO L158 Benchmark]: Boogie Preprocessor took 48.22ms. Allocated memory is still 159.4MB. Free memory was 111.7MB in the beginning and 110.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:22:31,077 INFO L158 Benchmark]: RCFGBuilder took 351.50ms. Allocated memory is still 159.4MB. Free memory was 110.3MB in the beginning and 131.7MB in the end (delta: -21.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,078 INFO L158 Benchmark]: TraceAbstraction took 4201.40ms. Allocated memory is still 159.4MB. Free memory was 130.9MB in the beginning and 73.7MB in the end (delta: 57.2MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,078 INFO L158 Benchmark]: Witness Printer took 56.85ms. Allocated memory is still 159.4MB. Free memory was 73.7MB in the beginning and 71.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:22:31,079 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 86.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.35ms. Allocated memory is still 159.4MB. Free memory was 124.3MB in the beginning and 113.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.43ms. Allocated memory is still 159.4MB. Free memory was 112.5MB in the beginning and 111.7MB in the end (delta: 730.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.22ms. Allocated memory is still 159.4MB. Free memory was 111.7MB in the beginning and 110.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 351.50ms. Allocated memory is still 159.4MB. Free memory was 110.3MB in the beginning and 131.7MB in the end (delta: -21.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4201.40ms. Allocated memory is still 159.4MB. Free memory was 130.9MB in the beginning and 73.7MB in the end (delta: 57.2MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. * Witness Printer took 56.85ms. Allocated memory is still 159.4MB. Free memory was 73.7MB in the beginning and 71.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 412 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 300 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 157 IncrementalHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 112 mSDtfsCounter, 157 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 270 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 347 ConstructedInterpolants, 0 QuantifiedInterpolants, 1000 SizeOfPredicates, 4 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 366/392 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: 28]: Loop Invariant Derived loop invariant: (((((y == 1) && (x == 1)) && (k == 1)) && (c == 1)) || (((((x == 0) && (0 <= k)) && (k <= 1)) && (c == 0)) && (y == 0))) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-09-21 12:22:31,095 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 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE