./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/verifythis/prefixsum_rec.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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:30:04,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:30:04,714 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:30:04,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:30:04,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:30:04,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:30:04,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:30:04,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:30:04,737 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:30:04,737 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:30:04,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:30:04,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:30:04,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:30:04,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:30:04,739 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:30:04,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:30:04,740 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:30:04,740 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:30:04,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:30:04,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:30:04,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:30:04,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:30:04,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:30:04,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:30:04,743 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:30:04,743 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:30:04,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:30:04,744 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:30:04,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:30:04,744 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:30:04,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:30:04,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:30:04,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:04,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:30:04,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:30:04,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:30:04,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:30:04,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:30:04,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:30:04,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:30:04,747 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:30:04,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:30:04,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:30:05,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:30:05,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:30:05,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:30:05,044 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:30:05,046 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:30:05,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-09-11 20:30:06,504 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:30:06,684 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:30:06,685 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-09-11 20:30:06,691 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e6ef23386/fa20a7ac709e47bd92bbf0dcc6afa391/FLAGd5b682cab [2024-09-11 20:30:06,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e6ef23386/fa20a7ac709e47bd92bbf0dcc6afa391 [2024-09-11 20:30:06,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:30:06,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:30:06,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:06,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:30:06,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:30:06,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:06,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da41dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06, skipping insertion in model container [2024-09-11 20:30:06,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:06,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:30:06,862 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2024-09-11 20:30:06,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:06,897 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:30:06,912 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2024-09-11 20:30:06,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:06,955 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:30:06,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06 WrapperNode [2024-09-11 20:30:06,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:06,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:06,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:30:06,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:30:06,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:06,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,008 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2024-09-11 20:30:07,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:07,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:30:07,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:30:07,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:30:07,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,049 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-09-11 20:30:07,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:30:07,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:30:07,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:30:07,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:30:07,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (1/1) ... [2024-09-11 20:30:07,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:07,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:07,119 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) [2024-09-11 20:30:07,123 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 [2024-09-11 20:30:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:30:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:30:07,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:30:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:30:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:30:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-09-11 20:30:07,161 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-09-11 20:30:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:30:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:30:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-11 20:30:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-09-11 20:30:07,162 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-09-11 20:30:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:30:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:30:07,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:30:07,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:30:07,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-11 20:30:07,164 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-11 20:30:07,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:30:07,290 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:30:07,291 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:30:07,560 INFO L? ?]: Removed 39 outVars from TransFormulas that were not future-live. [2024-09-11 20:30:07,560 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:30:07,589 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:30:07,589 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-11 20:30:07,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:07 BoogieIcfgContainer [2024-09-11 20:30:07,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:30:07,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:30:07,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:30:07,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:30:07,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:30:06" (1/3) ... [2024-09-11 20:30:07,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126c2390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:07, skipping insertion in model container [2024-09-11 20:30:07,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:06" (2/3) ... [2024-09-11 20:30:07,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126c2390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:07, skipping insertion in model container [2024-09-11 20:30:07,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:07" (3/3) ... [2024-09-11 20:30:07,599 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-09-11 20:30:07,621 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:30:07,622 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:30:07,672 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:30:07,678 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;@4d966f0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:30:07,679 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:30:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:30:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 20:30:07,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:07,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:07,697 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:07,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 485352820, now seen corresponding path program 1 times [2024-09-11 20:30:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:07,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234973076] [2024-09-11 20:30:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:30:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 20:30:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:30:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:08,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234973076] [2024-09-11 20:30:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234973076] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:08,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:30:08,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 20:30:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10327092] [2024-09-11 20:30:08,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:08,044 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 20:30:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 20:30:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:30:08,069 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:08,172 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2024-09-11 20:30:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 20:30:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-09-11 20:30:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:08,181 INFO L225 Difference]: With dead ends: 85 [2024-09-11 20:30:08,181 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 20:30:08,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:30:08,190 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:08,191 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 20:30:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-11 20:30:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:30:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-11 20:30:08,235 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 39 [2024-09-11 20:30:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:08,236 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-11 20:30:08,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:08,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-11 20:30:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 20:30:08,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:08,239 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:08,239 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:30:08,240 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:08,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1650249290, now seen corresponding path program 1 times [2024-09-11 20:30:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766497225] [2024-09-11 20:30:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:30:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 20:30:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:30:08,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766497225] [2024-09-11 20:30:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766497225] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:08,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:30:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:30:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098090267] [2024-09-11 20:30:08,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:08,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 20:30:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 20:30:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:30:08,723 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:08,864 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2024-09-11 20:30:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:30:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-09-11 20:30:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:08,867 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:30:08,867 INFO L226 Difference]: Without dead ends: 45 [2024-09-11 20:30:08,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:30:08,868 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:08,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 181 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-11 20:30:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2024-09-11 20:30:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:30:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-09-11 20:30:08,882 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2024-09-11 20:30:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:08,884 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-09-11 20:30:08,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:08,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-09-11 20:30:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 20:30:08,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:08,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:08,886 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:30:08,886 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:08,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -310323887, now seen corresponding path program 1 times [2024-09-11 20:30:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119546840] [2024-09-11 20:30:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:30:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:30:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 20:30:09,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:09,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119546840] [2024-09-11 20:30:09,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119546840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:09,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488689287] [2024-09-11 20:30:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:09,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:09,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:09,190 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) [2024-09-11 20:30:09,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:30:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:09,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 20:30:09,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 20:30:09,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 20:30:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488689287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:09,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:09,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-11 20:30:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915197520] [2024-09-11 20:30:09,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:09,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:30:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:30:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:30:09,548 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 20:30:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:09,704 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-09-11 20:30:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:30:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 40 [2024-09-11 20:30:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:09,707 INFO L225 Difference]: With dead ends: 67 [2024-09-11 20:30:09,707 INFO L226 Difference]: Without dead ends: 44 [2024-09-11 20:30:09,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:09,709 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:09,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-11 20:30:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-09-11 20:30:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:30:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-09-11 20:30:09,721 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 40 [2024-09-11 20:30:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:09,721 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-09-11 20:30:09,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 20:30:09,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-09-11 20:30:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 20:30:09,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:09,724 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:09,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:30:09,925 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:09,925 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:09,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1722309354, now seen corresponding path program 2 times [2024-09-11 20:30:09,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:09,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717457842] [2024-09-11 20:30:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:09,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:30:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-11 20:30:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:30:11,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717457842] [2024-09-11 20:30:11,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717457842] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717128007] [2024-09-11 20:30:11,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:30:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:11,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:11,730 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) [2024-09-11 20:30:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:30:11,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:30:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:11,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-11 20:30:11,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:11,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:30:12,080 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_downsweep_~left_9 Int)) (and (<= |c_downsweep_#in~right| (+ v_downsweep_~left_9 1)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (store (store .cse0 .cse1 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse1)) (+ |c_downsweep_#in~a.offset| (* v_downsweep_~left_9 4)) (select .cse0 .cse1))))) (<= v_downsweep_~left_9 |c_downsweep_#in~left|))) is different from true [2024-09-11 20:30:12,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2024-09-11 20:30:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:30:12,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717128007] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:12,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:30:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 28 [2024-09-11 20:30:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343337947] [2024-09-11 20:30:12,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:12,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-11 20:30:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-11 20:30:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=786, Unknown=1, NotChecked=56, Total=930 [2024-09-11 20:30:12,518 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-11 20:30:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:13,583 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2024-09-11 20:30:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:30:13,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2024-09-11 20:30:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:13,586 INFO L225 Difference]: With dead ends: 63 [2024-09-11 20:30:13,587 INFO L226 Difference]: Without dead ends: 61 [2024-09-11 20:30:13,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=1337, Unknown=1, NotChecked=74, Total=1560 [2024-09-11 20:30:13,588 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:13,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 305 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 783 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2024-09-11 20:30:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-11 20:30:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-09-11 20:30:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 12 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2024-09-11 20:30:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-11 20:30:13,601 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 41 [2024-09-11 20:30:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:13,602 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-11 20:30:13,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-11 20:30:13,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-11 20:30:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-11 20:30:13,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:13,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:13,622 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:30:13,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:13,809 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:13,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1633591371, now seen corresponding path program 1 times [2024-09-11 20:30:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:13,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716440930] [2024-09-11 20:30:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:30:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-11 20:30:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:30:14,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716440930] [2024-09-11 20:30:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716440930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097883614] [2024-09-11 20:30:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:14,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:14,042 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) [2024-09-11 20:30:14,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:30:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:14,141 WARN L260 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-09-11 20:30:14,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:14,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-09-11 20:30:14,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-11 20:30:14,335 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-09-11 20:30:14,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-09-11 20:30:14,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-09-11 20:30:14,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-09-11 20:30:14,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2024-09-11 20:30:14,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-09-11 20:30:14,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2024-09-11 20:30:14,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-09-11 20:30:14,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2024-09-11 20:30:14,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2024-09-11 20:30:15,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 91 [2024-09-11 20:30:15,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:30:15,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2024-09-11 20:30:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:30:15,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:15,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097883614] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:15,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:30:15,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 30 [2024-09-11 20:30:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874400323] [2024-09-11 20:30:15,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:15,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:30:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:30:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:30:15,748 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:30:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:17,477 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2024-09-11 20:30:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-11 20:30:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 44 [2024-09-11 20:30:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:17,480 INFO L225 Difference]: With dead ends: 110 [2024-09-11 20:30:17,480 INFO L226 Difference]: Without dead ends: 80 [2024-09-11 20:30:17,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=330, Invalid=3702, Unknown=0, NotChecked=0, Total=4032 [2024-09-11 20:30:17,485 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:17,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 351 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 20:30:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-11 20:30:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-09-11 20:30:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (26), 17 states have call predecessors, (26), 17 states have call successors, (26) [2024-09-11 20:30:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-11 20:30:17,515 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 44 [2024-09-11 20:30:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:17,515 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-11 20:30:17,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:30:17,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-11 20:30:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:30:17,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:17,519 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:17,538 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:17,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:17,720 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:17,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -723652070, now seen corresponding path program 1 times [2024-09-11 20:30:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652622621] [2024-09-11 20:30:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:30:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 20:30:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:30:17,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:17,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652622621] [2024-09-11 20:30:17,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652622621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:17,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422321389] [2024-09-11 20:30:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:17,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:17,973 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) [2024-09-11 20:30:17,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:30:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 20:30:18,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 20:30:18,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 20:30:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422321389] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:18,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2024-09-11 20:30:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506729789] [2024-09-11 20:30:18,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:18,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:30:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:30:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:18,243 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:18,391 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2024-09-11 20:30:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:30:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-09-11 20:30:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:18,396 INFO L225 Difference]: With dead ends: 100 [2024-09-11 20:30:18,396 INFO L226 Difference]: Without dead ends: 87 [2024-09-11 20:30:18,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:18,397 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:18,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 347 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-11 20:30:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2024-09-11 20:30:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (27), 19 states have call predecessors, (27), 18 states have call successors, (27) [2024-09-11 20:30:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 112 transitions. [2024-09-11 20:30:18,418 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 112 transitions. Word has length 48 [2024-09-11 20:30:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:18,419 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 112 transitions. [2024-09-11 20:30:18,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:30:18,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 112 transitions. [2024-09-11 20:30:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 20:30:18,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:18,421 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:18,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:18,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:18,622 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:18,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1958744979, now seen corresponding path program 2 times [2024-09-11 20:30:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63453414] [2024-09-11 20:30:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 20:30:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 20:30:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 20:30:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63453414] [2024-09-11 20:30:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63453414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871673294] [2024-09-11 20:30:18,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:30:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:18,817 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) [2024-09-11 20:30:18,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:30:18,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:30:18,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:18,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 20:30:18,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-11 20:30:19,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:30:19,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871673294] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:19,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:30:19,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-09-11 20:30:19,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041383529] [2024-09-11 20:30:19,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:19,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:30:19,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:30:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:19,075 INFO L87 Difference]: Start difference. First operand 83 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 20:30:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:19,186 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2024-09-11 20:30:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:30:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 49 [2024-09-11 20:30:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:19,188 INFO L225 Difference]: With dead ends: 103 [2024-09-11 20:30:19,188 INFO L226 Difference]: Without dead ends: 90 [2024-09-11 20:30:19,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:19,189 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:19,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 237 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-11 20:30:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2024-09-11 20:30:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2024-09-11 20:30:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2024-09-11 20:30:19,217 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 49 [2024-09-11 20:30:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:19,217 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2024-09-11 20:30:19,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 20:30:19,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2024-09-11 20:30:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-11 20:30:19,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:19,219 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:19,238 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:30:19,419 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 20:30:19,420 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:19,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1534880555, now seen corresponding path program 1 times [2024-09-11 20:30:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626286113] [2024-09-11 20:30:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:30:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-11 20:30:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:30:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:19,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626286113] [2024-09-11 20:30:19,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626286113] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:19,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891603535] [2024-09-11 20:30:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:19,606 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) [2024-09-11 20:30:19,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:30:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 20:30:19,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:30:19,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:30:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891603535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:19,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-09-11 20:30:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383820206] [2024-09-11 20:30:19,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:19,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 20:30:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 20:30:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:30:19,919 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-11 20:30:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:20,080 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2024-09-11 20:30:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:30:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 53 [2024-09-11 20:30:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:20,082 INFO L225 Difference]: With dead ends: 85 [2024-09-11 20:30:20,082 INFO L226 Difference]: Without dead ends: 77 [2024-09-11 20:30:20,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:30:20,083 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:20,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 226 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-11 20:30:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-09-11 20:30:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2024-09-11 20:30:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2024-09-11 20:30:20,100 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 53 [2024-09-11 20:30:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:20,100 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2024-09-11 20:30:20,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-11 20:30:20,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2024-09-11 20:30:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:30:20,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:20,102 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:20,119 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 20:30:20,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:20,307 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:20,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash -901562110, now seen corresponding path program 1 times [2024-09-11 20:30:20,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:20,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089217373] [2024-09-11 20:30:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:20,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 20:30:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 20:30:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 20:30:20,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:20,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089217373] [2024-09-11 20:30:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089217373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:20,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718326932] [2024-09-11 20:30:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:20,503 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) [2024-09-11 20:30:20,504 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:30:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:20,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 20:30:20,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 20:30:20,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 20:30:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718326932] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:20,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2024-09-11 20:30:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120229564] [2024-09-11 20:30:20,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:20,858 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:30:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:30:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:30:20,859 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-11 20:30:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:21,037 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2024-09-11 20:30:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:30:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 54 [2024-09-11 20:30:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:21,039 INFO L225 Difference]: With dead ends: 92 [2024-09-11 20:30:21,039 INFO L226 Difference]: Without dead ends: 75 [2024-09-11 20:30:21,039 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-11 20:30:21,040 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:21,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 250 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-11 20:30:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-11 20:30:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-11 20:30:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2024-09-11 20:30:21,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 54 [2024-09-11 20:30:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:21,058 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2024-09-11 20:30:21,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-11 20:30:21,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2024-09-11 20:30:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-11 20:30:21,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:21,062 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:21,079 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:30:21,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:21,266 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:21,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2099855499, now seen corresponding path program 2 times [2024-09-11 20:30:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:21,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036958424] [2024-09-11 20:30:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:21,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:30:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 20:30:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-11 20:30:21,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:21,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036958424] [2024-09-11 20:30:21,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036958424] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:21,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147096645] [2024-09-11 20:30:21,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:30:21,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:21,460 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:21,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:30:21,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:30:21,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:21,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 20:30:21,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:30:21,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:30:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147096645] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:21,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2024-09-11 20:30:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767807415] [2024-09-11 20:30:21,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:21,952 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:30:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:30:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:30:21,953 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-11 20:30:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:22,251 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2024-09-11 20:30:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:30:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 53 [2024-09-11 20:30:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:22,253 INFO L225 Difference]: With dead ends: 85 [2024-09-11 20:30:22,253 INFO L226 Difference]: Without dead ends: 75 [2024-09-11 20:30:22,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:30:22,254 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:22,254 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 253 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:30:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-11 20:30:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-11 20:30:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 7 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-11 20:30:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2024-09-11 20:30:22,272 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 53 [2024-09-11 20:30:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:22,272 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2024-09-11 20:30:22,272 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-11 20:30:22,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2024-09-11 20:30:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:30:22,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:22,274 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:22,287 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:22,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:22,476 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:22,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1686669473, now seen corresponding path program 1 times [2024-09-11 20:30:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377173882] [2024-09-11 20:30:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:30:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-11 20:30:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:30:22,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:22,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377173882] [2024-09-11 20:30:22,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377173882] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:22,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420023759] [2024-09-11 20:30:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:22,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:22,725 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:30:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:22,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 20:30:22,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:30:22,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:30:23,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420023759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:23,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:23,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2024-09-11 20:30:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884849013] [2024-09-11 20:30:23,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:23,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:30:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:30:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:30:23,187 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 18 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 20:30:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:23,347 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2024-09-11 20:30:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:30:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 56 [2024-09-11 20:30:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:23,348 INFO L225 Difference]: With dead ends: 86 [2024-09-11 20:30:23,348 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 20:30:23,349 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:30:23,349 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:23,350 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 233 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 20:30:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-09-11 20:30:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-09-11 20:30:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-09-11 20:30:23,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 56 [2024-09-11 20:30:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:23,364 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-09-11 20:30:23,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 20:30:23,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-09-11 20:30:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 20:30:23,365 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:23,365 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:23,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 20:30:23,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:30:23,570 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:23,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1375885626, now seen corresponding path program 1 times [2024-09-11 20:30:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134399655] [2024-09-11 20:30:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:30:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-11 20:30:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-11 20:30:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134399655] [2024-09-11 20:30:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134399655] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767548467] [2024-09-11 20:30:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:23,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:23,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:23,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:23,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:30:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:24,091 WARN L260 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-09-11 20:30:24,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:24,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-09-11 20:30:24,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-11 20:30:24,298 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-09-11 20:30:24,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-09-11 20:30:24,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-09-11 20:30:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-09-11 20:30:24,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-09-11 20:30:24,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-09-11 20:30:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-11 20:30:24,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:39,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767548467] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:39,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:30:39,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 24 [2024-09-11 20:30:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802813910] [2024-09-11 20:30:39,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:39,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:30:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:30:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:30:39,762 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 24 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-11 20:30:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:41,094 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2024-09-11 20:30:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:30:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 64 [2024-09-11 20:30:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:41,096 INFO L225 Difference]: With dead ends: 93 [2024-09-11 20:30:41,096 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 20:30:41,097 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 20:30:41,098 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:41,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 365 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:30:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 20:30:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-09-11 20:30:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-11 20:30:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2024-09-11 20:30:41,112 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 64 [2024-09-11 20:30:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:41,113 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2024-09-11 20:30:41,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-11 20:30:41,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2024-09-11 20:30:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-11 20:30:41,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:41,114 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:41,131 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 20:30:41,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 20:30:41,315 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:41,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 530647126, now seen corresponding path program 1 times [2024-09-11 20:30:41,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:41,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459270600] [2024-09-11 20:30:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:30:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:30:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 20:30:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-11 20:30:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 20:30:41,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459270600] [2024-09-11 20:30:41,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459270600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44964917] [2024-09-11 20:30:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:41,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:41,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:41,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:41,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:30:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 20:30:41,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 20:30:41,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:30:42,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44964917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:42,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:42,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 23 [2024-09-11 20:30:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682368106] [2024-09-11 20:30:42,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:42,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:30:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:30:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:30:42,174 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 23 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-11 20:30:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:42,697 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2024-09-11 20:30:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:30:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) Word has length 65 [2024-09-11 20:30:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:42,698 INFO L225 Difference]: With dead ends: 96 [2024-09-11 20:30:42,698 INFO L226 Difference]: Without dead ends: 69 [2024-09-11 20:30:42,698 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:30:42,701 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 31 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:42,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 374 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:30:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-11 20:30:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-09-11 20:30:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-11 20:30:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-11 20:30:42,720 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 65 [2024-09-11 20:30:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:42,721 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-11 20:30:42,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-11 20:30:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-11 20:30:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 20:30:42,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:42,723 INFO L216 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:42,741 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:30:42,923 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:42,924 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:42,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2057597402, now seen corresponding path program 2 times [2024-09-11 20:30:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63294841] [2024-09-11 20:30:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:49,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:49,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 20:30:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:49,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:30:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:49,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:30:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:49,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:30:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:51,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:51,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:30:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:51,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:30:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat