./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.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/bresenham-ll_valuebound2.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 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 --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 19:06:10,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:06:10,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:06:10,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:06:10,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:06:10,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:06:10,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:06:10,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:06:10,301 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:06:10,302 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:06:10,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:06:10,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:06:10,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:06:10,306 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:06:10,306 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:06:10,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:06:10,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:06:10,307 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:06:10,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:06:10,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:06:10,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:06:10,311 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:06:10,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:06:10,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:06:10,312 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:06:10,312 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:06:10,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:06:10,313 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:06:10,313 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:06:10,313 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:06:10,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:06:10,314 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:06:10,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:06:10,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:06:10,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:06:10,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:06:10,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:06:10,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:06:10,328 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:06:10,328 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:06:10,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:06:10,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:06:10,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:06:10,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:06:10,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:06:10,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:06:10,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:06:10,637 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:06:10,638 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2024-09-20 19:06:12,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:06:12,218 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:06:12,219 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2024-09-20 19:06:12,234 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ffe4df491/5308254ebc514b25805e3dcfc6439486/FLAGd9b9ce22a [2024-09-20 19:06:12,595 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ffe4df491/5308254ebc514b25805e3dcfc6439486 [2024-09-20 19:06:12,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:06:12,598 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:06:12,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:06:12,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:06:12,605 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:06:12,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47527d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12, skipping insertion in model container [2024-09-20 19:06:12,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,624 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:06:12,785 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/bresenham-ll_valuebound2.c[597,610] [2024-09-20 19:06:12,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:06:12,821 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:06:12,834 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/bresenham-ll_valuebound2.c[597,610] [2024-09-20 19:06:12,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:06:12,859 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:06:12,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12 WrapperNode [2024-09-20 19:06:12,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:06:12,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:06:12,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:06:12,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:06:12,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,877 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:06:12,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:06:12,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:06:12,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:06:12,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:06:12,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,904 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 19:06:12,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:06:12,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:06:12,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:06:12,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:06:12,921 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (1/1) ... [2024-09-20 19:06:12,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:06:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:12,946 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 19:06:12,949 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 19:06:12,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:06:12,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:06:12,992 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:06:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:06:12,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:06:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:06:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:06:12,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:06:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:06:12,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:06:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:06:12,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:06:13,043 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:06:13,045 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:06:13,218 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:06:13,218 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:06:13,236 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:06:13,236 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:06:13,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:13 BoogieIcfgContainer [2024-09-20 19:06:13,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:06:13,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:06:13,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:06:13,244 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:06:13,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:06:12" (1/3) ... [2024-09-20 19:06:13,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa2ddfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:06:13, skipping insertion in model container [2024-09-20 19:06:13,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:06:12" (2/3) ... [2024-09-20 19:06:13,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa2ddfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:06:13, skipping insertion in model container [2024-09-20 19:06:13,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:13" (3/3) ... [2024-09-20 19:06:13,248 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2024-09-20 19:06:13,263 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:06:13,264 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:06:13,313 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:06:13,319 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;@29c87d74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:06:13,319 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:06:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:06:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:06:13,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:13,330 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:13,331 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:13,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1345059158, now seen corresponding path program 1 times [2024-09-20 19:06:13,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:13,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479931693] [2024-09-20 19:06:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:13,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:13,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:13,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:06:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479931693] [2024-09-20 19:06:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479931693] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:13,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:13,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:06:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394810415] [2024-09-20 19:06:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:13,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:06:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:06:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:06:13,549 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (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) [2024-09-20 19:06:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:13,578 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-09-20 19:06:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:06:13,582 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, (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 22 [2024-09-20 19:06:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:13,589 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:06:13,589 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 19:06:13,592 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 [2024-09-20 19:06:13,595 INFO L434 NwaCegarLoop]: 31 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, 31 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 19:06:13,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:06:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 19:06:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-20 19:06:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 19:06:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-20 19:06:13,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2024-09-20 19:06:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:13,624 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-20 19:06:13,625 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, (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) [2024-09-20 19:06:13,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-20 19:06:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:06:13,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:13,627 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:13,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:06:13,627 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:13,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 745253850, now seen corresponding path program 1 times [2024-09-20 19:06:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379094748] [2024-09-20 19:06:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:13,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516776465] [2024-09-20 19:06:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:13,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:13,668 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 19:06:13,670 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 19:06:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:13,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 19:06:13,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:13,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:06:13,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379094748] [2024-09-20 19:06:13,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516776465] [2024-09-20 19:06:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516776465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:13,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:06:13,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 19:06:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212966556] [2024-09-20 19:06:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:13,872 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:06:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:06:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:13,873 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-09-20 19:06:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:14,001 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-09-20 19:06:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:06:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 22 [2024-09-20 19:06:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:14,006 INFO L225 Difference]: With dead ends: 38 [2024-09-20 19:06:14,007 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 19:06:14,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:06:14,008 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:14,009 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 19:06:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-09-20 19:06:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:06:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-20 19:06:14,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2024-09-20 19:06:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:14,025 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-20 19:06:14,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-09-20 19:06:14,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-20 19:06:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 19:06:14,027 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:14,027 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:14,040 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 19:06:14,229 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 19:06:14,229 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:14,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -291852925, now seen corresponding path program 1 times [2024-09-20 19:06:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:14,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609581479] [2024-09-20 19:06:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:06:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:06:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:06:14,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609581479] [2024-09-20 19:06:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609581479] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:06:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008845026] [2024-09-20 19:06:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:14,627 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 19:06:14,630 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 19:06:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:14,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 19:06:14,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:14,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:06:14,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008845026] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:06:14,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:06:14,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-20 19:06:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140996974] [2024-09-20 19:06:14,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:06:14,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:06:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:06:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:06:14,806 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2024-09-20 19:06:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:14,892 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-09-20 19:06:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:06:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 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 29 [2024-09-20 19:06:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:14,893 INFO L225 Difference]: With dead ends: 42 [2024-09-20 19:06:14,894 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:06:14,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:06:14,895 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:14,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:06:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-09-20 19:06:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:06:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-09-20 19:06:14,907 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2024-09-20 19:06:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:14,908 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-09-20 19:06:14,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2024-09-20 19:06:14,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-09-20 19:06:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:06:14,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:14,911 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, 1, 1, 1] [2024-09-20 19:06:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:15,114 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 [2024-09-20 19:06:15,115 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:15,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1466394034, now seen corresponding path program 1 times [2024-09-20 19:06:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295062741] [2024-09-20 19:06:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:15,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:15,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174120422] [2024-09-20 19:06:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:15,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:15,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:15,159 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 19:06:15,162 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 19:06:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:15,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:06:15,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:15,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:06:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295062741] [2024-09-20 19:06:15,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174120422] [2024-09-20 19:06:15,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174120422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:15,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:15,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2024-09-20 19:06:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710169347] [2024-09-20 19:06:15,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:15,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:06:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:06:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:06:15,804 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:06:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:16,382 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2024-09-20 19:06:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:06:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31 [2024-09-20 19:06:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:16,383 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:06:16,383 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 19:06:16,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:06:16,385 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:16,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:06:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 19:06:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 19:06:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:06:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-09-20 19:06:16,396 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2024-09-20 19:06:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:16,396 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-09-20 19:06:16,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:06:16,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-09-20 19:06:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 19:06:16,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:16,398 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:16,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:06:16,602 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 [2024-09-20 19:06:16,605 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:16,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -697702451, now seen corresponding path program 1 times [2024-09-20 19:06:16,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:16,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729378357] [2024-09-20 19:06:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:16,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:06:16,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223129422] [2024-09-20 19:06:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:16,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:16,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:16,629 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 19:06:16,632 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 19:06:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:16,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:06:16,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:06:17,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:06:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729378357] [2024-09-20 19:06:17,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:06:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223129422] [2024-09-20 19:06:17,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223129422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:17,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:06:17,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2024-09-20 19:06:17,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018281767] [2024-09-20 19:06:17,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:17,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:06:17,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:06:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:06:17,676 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 19:06:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:19,689 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-09-20 19:06:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:06:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 38 [2024-09-20 19:06:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:19,691 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:06:19,692 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 19:06:19,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:06:19,694 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:19,695 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 19:06:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 19:06:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-09-20 19:06:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:06:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-20 19:06:19,717 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2024-09-20 19:06:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:19,717 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-20 19:06:19,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 19:06:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-20 19:06:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 19:06:19,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:19,719 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:19,738 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 19:06:19,925 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 [2024-09-20 19:06:19,926 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:19,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1873598157, now seen corresponding path program 1 times [2024-09-20 19:06:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26384432] [2024-09-20 19:06:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:06:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:06:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:06:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:06:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:06:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:06:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26384432] [2024-09-20 19:06:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26384432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:06:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031602115] [2024-09-20 19:06:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:20,052 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 19:06:20,053 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 19:06:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 19:06:20,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 19:06:20,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:06:20,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031602115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:20,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:06:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-09-20 19:06:20,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899956120] [2024-09-20 19:06:20,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:20,234 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:06:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:06:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:06:20,235 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 19:06:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:20,325 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-09-20 19:06:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:06:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 56 [2024-09-20 19:06:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:20,328 INFO L225 Difference]: With dead ends: 80 [2024-09-20 19:06:20,329 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:06:20,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:06:20,331 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:20,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:06:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:06:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-20 19:06:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:06:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-09-20 19:06:20,360 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 56 [2024-09-20 19:06:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:20,361 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-09-20 19:06:20,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 19:06:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-09-20 19:06:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 19:06:20,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:20,363 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:20,381 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 19:06:20,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:06:20,565 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:20,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 68159823, now seen corresponding path program 2 times [2024-09-20 19:06:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:20,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332033120] [2024-09-20 19:06:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:06:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:06:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:06:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:06:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:06:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:06:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332033120] [2024-09-20 19:06:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332033120] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:06:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549426436] [2024-09-20 19:06:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:06:20,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:20,826 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 19:06:20,827 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 19:06:20,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:06:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:20,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:06:20,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:06:21,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:06:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549426436] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:21,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:06:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-09-20 19:06:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788712819] [2024-09-20 19:06:21,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:21,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:06:21,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:06:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:06:21,416 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-20 19:06:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:06:22,066 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2024-09-20 19:06:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:06:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 56 [2024-09-20 19:06:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:06:22,068 INFO L225 Difference]: With dead ends: 84 [2024-09-20 19:06:22,068 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 19:06:22,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 19:06:22,069 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:06:22,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:06:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 19:06:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2024-09-20 19:06:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:06:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-09-20 19:06:22,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 56 [2024-09-20 19:06:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:06:22,105 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-09-20 19:06:22,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-20 19:06:22,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-09-20 19:06:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 19:06:22,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:06:22,107 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:06:22,124 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:06:22,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:22,312 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:06:22,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:06:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1701302009, now seen corresponding path program 3 times [2024-09-20 19:06:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:06:22,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235461036] [2024-09-20 19:06:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:06:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:06:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:06:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:06:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:06:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:06:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:06:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:06:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:06:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 19:06:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:06:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 19:06:22,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:06:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235461036] [2024-09-20 19:06:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235461036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:06:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711662984] [2024-09-20 19:06:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:06:22,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:06:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:06:22,781 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 19:06:22,783 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 19:06:22,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 19:06:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:06:22,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:06:22,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-20 19:06:23,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:06:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 19:06:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711662984] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:06:26,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:06:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 12] total 37 [2024-09-20 19:06:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831515169] [2024-09-20 19:06:26,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:06:26,724 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 19:06:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:06:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 19:06:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:06:26,725 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 37 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 13 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 19:06:35,833 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 19:06:44,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 19:06:47,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 19:06:56,179 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 19:07:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:03,996 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2024-09-20 19:07:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-20 19:07:03,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 13 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 65 [2024-09-20 19:07:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:03,997 INFO L225 Difference]: With dead ends: 95 [2024-09-20 19:07:03,997 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:07:03,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=752, Invalid=3801, Unknown=3, NotChecked=0, Total=4556 [2024-09-20 19:07:04,000 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 50 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:04,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 435 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 895 Invalid, 3 Unknown, 0 Unchecked, 17.2s Time] [2024-09-20 19:07:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:07:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:07:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:07:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:07:04,001 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2024-09-20 19:07:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:04,001 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:07:04,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 13 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 19:07:04,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:07:04,002 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:07:04,005 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:07:04,018 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 19:07:04,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:04,212 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2024-09-20 19:07:04,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:07:08,107 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:07:08,114 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-09-20 19:07:08,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:07:08 BoogieIcfgContainer [2024-09-20 19:07:08,129 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:07:08,129 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:07:08,129 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:07:08,129 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:07:08,130 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:06:13" (3/4) ... [2024-09-20 19:07:08,131 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:07:08,187 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:07:08,188 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:07:08,188 INFO L158 Benchmark]: Toolchain (without parser) took 55590.00ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 129.6MB in the beginning and 167.3MB in the end (delta: -37.6MB). Peak memory consumption was 36.3MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,189 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:08,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.64ms. Allocated memory is still 159.4MB. Free memory was 129.6MB in the beginning and 117.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,189 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.55ms. Allocated memory is still 159.4MB. Free memory was 117.6MB in the beginning and 117.0MB in the end (delta: 556.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:08,189 INFO L158 Benchmark]: Boogie Preprocessor took 40.48ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,190 INFO L158 Benchmark]: RCFGBuilder took 317.99ms. Allocated memory is still 159.4MB. Free memory was 114.9MB in the beginning and 124.1MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,190 INFO L158 Benchmark]: TraceAbstraction took 54888.51ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 123.6MB in the beginning and 169.8MB in the end (delta: -46.2MB). Peak memory consumption was 133.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,191 INFO L158 Benchmark]: Witness Printer took 58.89ms. Allocated memory is still 232.8MB. Free memory was 169.8MB in the beginning and 167.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:08,193 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.64ms. Allocated memory is still 159.4MB. Free memory was 129.6MB in the beginning and 117.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.55ms. Allocated memory is still 159.4MB. Free memory was 117.6MB in the beginning and 117.0MB in the end (delta: 556.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.48ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 317.99ms. Allocated memory is still 159.4MB. Free memory was 114.9MB in the beginning and 124.1MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 54888.51ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 123.6MB in the beginning and 169.8MB in the end (delta: -46.2MB). Peak memory consumption was 133.1MB. Max. memory is 16.1GB. * Witness Printer took 58.89ms. Allocated memory is still 232.8MB. Free memory was 169.8MB in the beginning and 167.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * 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: 16]: 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: 50.9s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 40.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 139 SdHoareTripleChecker+Valid, 19.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 136 mSDsluCounter, 1260 SdHoareTripleChecker+Invalid, 18.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1084 mSDsCounter, 121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1812 IncrementalHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 121 mSolverCounterUnsat, 176 mSDtfsCounter, 1812 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 708 GetRequests, 521 SyntacticMatches, 3 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 26.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, InterpolantAutomatonStates: 130, 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, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 616 NumberOfCodeBlocks, 589 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 3 QuantifiedInterpolants, 4531 SizeOfPredicates, 23 NumberOfNonLiveVariables, 732 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 544/714 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: 32]: Loop Invariant Derived loop invariant: (((((X <= 2) && ((((long long) Y * 2) + (2 * ((__int128) Y * x))) == (((((__int128) X * y) * 2) + X) + v))) && (0 <= Y)) && (0 <= X)) && (Y <= 2)) - ProcedureContractResult [Line: 10]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 13]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:07:08,246 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE