./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/recursive/gcd02.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 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:09:33,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:09:33,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:09:33,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:09:33,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:09:33,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:09:33,966 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:09:33,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:09:33,967 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:09:33,967 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:09:33,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:09:33,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:09:33,968 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:09:33,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:09:33,970 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:09:33,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:09:33,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:09:33,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:09:33,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:09:33,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:09:33,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:09:33,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:09:33,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:09:33,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:09:33,976 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:09:33,976 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:09:33,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:09:33,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:09:33,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:09:33,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:09:33,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:09:33,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:09:33,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:09:33,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:09:33,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:09:33,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:09:33,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:09:33,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:09:33,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:09:33,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:09:33,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:09:33,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:09:33,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:09:34,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:09:34,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:09:34,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:09:34,276 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:09:34,277 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:09:34,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/gcd02.c [2024-10-15 15:09:35,648 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:09:35,809 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:09:35,809 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c [2024-10-15 15:09:35,816 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6abaf2ca9/49342a492567428d9b61e0774052bfee/FLAG9f5b98fc7 [2024-10-15 15:09:36,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6abaf2ca9/49342a492567428d9b61e0774052bfee [2024-10-15 15:09:36,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:09:36,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:09:36,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:09:36,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:09:36,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:09:36,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5ddd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36, skipping insertion in model container [2024-10-15 15:09:36,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,244 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:09:36,401 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c[623,636] [2024-10-15 15:09:36,412 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2024-10-15 15:09:36,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:09:36,422 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:09:36,431 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c[623,636] [2024-10-15 15:09:36,436 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2024-10-15 15:09:36,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:09:36,450 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:09:36,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36 WrapperNode [2024-10-15 15:09:36,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:09:36,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:09:36,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:09:36,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:09:36,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,469 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:09:36,469 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:09:36,470 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:09:36,470 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:09:36,470 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:09:36,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,492 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-15 15:09:36,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:09:36,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:09:36,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:09:36,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:09:36,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (1/1) ... [2024-10-15 15:09:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:09:36,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:36,538 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) [2024-10-15 15:09:36,545 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 [2024-10-15 15:09:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:09:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2024-10-15 15:09:36,587 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2024-10-15 15:09:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:09:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:09:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:09:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:09:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:09:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:09:36,589 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2024-10-15 15:09:36,589 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2024-10-15 15:09:36,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:09:36,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:09:36,650 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:09:36,652 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:09:36,824 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-15 15:09:36,825 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:09:36,844 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:09:36,844 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-15 15:09:36,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:36 BoogieIcfgContainer [2024-10-15 15:09:36,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:09:36,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:09:36,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:09:36,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:09:36,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:09:36" (1/3) ... [2024-10-15 15:09:36,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a2bb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:36, skipping insertion in model container [2024-10-15 15:09:36,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:36" (2/3) ... [2024-10-15 15:09:36,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a2bb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:36, skipping insertion in model container [2024-10-15 15:09:36,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:36" (3/3) ... [2024-10-15 15:09:36,853 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2024-10-15 15:09:36,869 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:09:36,869 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-15 15:09:36,926 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:09:36,932 INFO L333 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;@7510767, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:09:36,932 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-15 15:09:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:09:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-15 15:09:36,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:36,941 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:36,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:36,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1001653490, now seen corresponding path program 1 times [2024-10-15 15:09:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:36,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151900245] [2024-10-15 15:09:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:37,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:09:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:37,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151900245] [2024-10-15 15:09:37,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151900245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:37,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:37,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 15:09:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022675477] [2024-10-15 15:09:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:37,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 15:09:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:37,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 15:09:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 15:09:37,390 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:37,544 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2024-10-15 15:09:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:09:37,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-15 15:09:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:37,556 INFO L225 Difference]: With dead ends: 85 [2024-10-15 15:09:37,557 INFO L226 Difference]: Without dead ends: 48 [2024-10-15 15:09:37,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-15 15:09:37,566 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:37,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-15 15:09:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-10-15 15:09:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 15:09:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-10-15 15:09:37,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-10-15 15:09:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:37,629 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-10-15 15:09:37,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:37,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-10-15 15:09:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-15 15:09:37,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:37,632 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:37,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:09:37,633 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:37,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:37,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2101058803, now seen corresponding path program 1 times [2024-10-15 15:09:37,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:37,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26481596] [2024-10-15 15:09:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:37,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:09:37,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:37,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26481596] [2024-10-15 15:09:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26481596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:37,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:37,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-15 15:09:37,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287143561] [2024-10-15 15:09:37,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:37,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 15:09:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 15:09:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-15 15:09:37,852 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:38,000 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2024-10-15 15:09:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:09:38,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-15 15:09:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:38,003 INFO L225 Difference]: With dead ends: 68 [2024-10-15 15:09:38,003 INFO L226 Difference]: Without dead ends: 66 [2024-10-15 15:09:38,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:09:38,004 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:38,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 111 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-15 15:09:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-10-15 15:09:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 15:09:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-15 15:09:38,027 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 17 [2024-10-15 15:09:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:38,028 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-15 15:09:38,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:38,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-15 15:09:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-15 15:09:38,029 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:38,030 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:38,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 15:09:38,030 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:38,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2098228658, now seen corresponding path program 1 times [2024-10-15 15:09:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:38,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607887697] [2024-10-15 15:09:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:38,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:09:38,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:38,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607887697] [2024-10-15 15:09:38,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607887697] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:38,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:38,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 15:09:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483772825] [2024-10-15 15:09:38,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:38,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 15:09:38,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 15:09:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-15 15:09:38,153 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:38,276 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2024-10-15 15:09:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:09:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-15 15:09:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:38,287 INFO L225 Difference]: With dead ends: 66 [2024-10-15 15:09:38,287 INFO L226 Difference]: Without dead ends: 64 [2024-10-15 15:09:38,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:09:38,289 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:38,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 146 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-15 15:09:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-10-15 15:09:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 15:09:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-10-15 15:09:38,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 17 [2024-10-15 15:09:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:38,321 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-10-15 15:09:38,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:09:38,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-10-15 15:09:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-15 15:09:38,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:38,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:38,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 15:09:38,326 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:38,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1634934741, now seen corresponding path program 1 times [2024-10-15 15:09:38,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:38,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91580542] [2024-10-15 15:09:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:38,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 15:09:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:09:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:38,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91580542] [2024-10-15 15:09:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91580542] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:38,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-15 15:09:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073388834] [2024-10-15 15:09:38,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:38,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 15:09:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 15:09:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 15:09:38,427 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:09:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:38,459 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-10-15 15:09:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 15:09:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-15 15:09:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:38,465 INFO L225 Difference]: With dead ends: 58 [2024-10-15 15:09:38,465 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 15:09:38,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 15:09:38,466 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:38,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:09:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 15:09:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-15 15:09:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-15 15:09:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-15 15:09:38,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 23 [2024-10-15 15:09:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:38,488 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-15 15:09:38,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:09:38,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-15 15:09:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:09:38,490 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:38,490 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:38,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-15 15:09:38,491 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:38,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,491 INFO L85 PathProgramCache]: Analyzing trace with hash -146564981, now seen corresponding path program 1 times [2024-10-15 15:09:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123994768] [2024-10-15 15:09:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 15:09:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:09:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:38,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123994768] [2024-10-15 15:09:38,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123994768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:38,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:38,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:09:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484175031] [2024-10-15 15:09:38,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:38,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:09:38,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:09:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:09:38,677 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:09:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:38,848 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-10-15 15:09:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:09:38,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-15 15:09:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:38,850 INFO L225 Difference]: With dead ends: 72 [2024-10-15 15:09:38,850 INFO L226 Difference]: Without dead ends: 68 [2024-10-15 15:09:38,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:09:38,851 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:38,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 157 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-15 15:09:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-10-15 15:09:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-15 15:09:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2024-10-15 15:09:38,883 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 24 [2024-10-15 15:09:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:38,886 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2024-10-15 15:09:38,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:09:38,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2024-10-15 15:09:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:09:38,888 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:38,888 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-15 15:09:38,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-15 15:09:38,888 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:38,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:38,889 INFO L85 PathProgramCache]: Analyzing trace with hash -698589569, now seen corresponding path program 1 times [2024-10-15 15:09:38,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:38,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060932317] [2024-10-15 15:09:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 15:09:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:09:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060932317] [2024-10-15 15:09:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060932317] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 15:09:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757670997] [2024-10-15 15:09:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:38,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 15:09:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 15:09:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 15:09:38,991 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-15 15:09:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:39,022 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-10-15 15:09:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 15:09:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-10-15 15:09:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:39,024 INFO L225 Difference]: With dead ends: 67 [2024-10-15 15:09:39,027 INFO L226 Difference]: Without dead ends: 58 [2024-10-15 15:09:39,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 15:09:39,029 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:39,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:09:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-15 15:09:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-15 15:09:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-10-15 15:09:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-15 15:09:39,047 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 30 [2024-10-15 15:09:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:39,048 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-15 15:09:39,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-15 15:09:39,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-15 15:09:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 15:09:39,050 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:39,050 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:39,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-15 15:09:39,050 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:39,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1845010923, now seen corresponding path program 1 times [2024-10-15 15:09:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881809064] [2024-10-15 15:09:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 15:09:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:09:39,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:39,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881809064] [2024-10-15 15:09:39,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881809064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:39,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153342592] [2024-10-15 15:09:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:39,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:39,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:39,275 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) [2024-10-15 15:09:39,276 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:09:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:39,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-15 15:09:39,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:09:39,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:09:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153342592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:39,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2024-10-15 15:09:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030956274] [2024-10-15 15:09:39,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:39,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:09:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:09:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:09:39,659 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-15 15:09:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:39,863 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-10-15 15:09:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:09:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-10-15 15:09:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:39,866 INFO L225 Difference]: With dead ends: 66 [2024-10-15 15:09:39,866 INFO L226 Difference]: Without dead ends: 58 [2024-10-15 15:09:39,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-15 15:09:39,867 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:39,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 158 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-15 15:09:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-10-15 15:09:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 15:09:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-10-15 15:09:39,886 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 31 [2024-10-15 15:09:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:39,886 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-10-15 15:09:39,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-15 15:09:39,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-10-15 15:09:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 15:09:39,889 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:39,889 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:39,908 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:09:40,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:09:40,095 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:40,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2081598593, now seen corresponding path program 1 times [2024-10-15 15:09:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086138980] [2024-10-15 15:09:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:09:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:09:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:40,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086138980] [2024-10-15 15:09:40,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086138980] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:09:40,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:09:40,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-15 15:09:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465607214] [2024-10-15 15:09:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:09:40,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 15:09:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 15:09:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:09:40,283 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:09:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:40,438 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2024-10-15 15:09:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:09:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-10-15 15:09:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:40,440 INFO L225 Difference]: With dead ends: 77 [2024-10-15 15:09:40,441 INFO L226 Difference]: Without dead ends: 73 [2024-10-15 15:09:40,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:09:40,442 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:40,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 161 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-15 15:09:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2024-10-15 15:09:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2024-10-15 15:09:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-10-15 15:09:40,468 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 32 [2024-10-15 15:09:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:40,469 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-10-15 15:09:40,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:09:40,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-10-15 15:09:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 15:09:40,473 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:40,473 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:40,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-15 15:09:40,473 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:40,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1569823201, now seen corresponding path program 1 times [2024-10-15 15:09:40,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:40,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134925336] [2024-10-15 15:09:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:09:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:09:40,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134925336] [2024-10-15 15:09:40,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134925336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:40,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276020890] [2024-10-15 15:09:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:40,652 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) [2024-10-15 15:09:40,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:09:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:40,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 15:09:40,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:09:40,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 15:09:41,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276020890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:41,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:41,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-10-15 15:09:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110393124] [2024-10-15 15:09:41,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:41,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 15:09:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 15:09:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:09:41,165 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-15 15:09:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:41,402 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2024-10-15 15:09:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-15 15:09:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 32 [2024-10-15 15:09:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:41,404 INFO L225 Difference]: With dead ends: 85 [2024-10-15 15:09:41,404 INFO L226 Difference]: Without dead ends: 81 [2024-10-15 15:09:41,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:09:41,405 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:41,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 256 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:09:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-15 15:09:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2024-10-15 15:09:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (20), 15 states have call predecessors, (20), 11 states have call successors, (20) [2024-10-15 15:09:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-10-15 15:09:41,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2024-10-15 15:09:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:41,423 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-10-15 15:09:41,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-15 15:09:41,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-10-15 15:09:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 15:09:41,425 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:41,425 INFO L215 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] [2024-10-15 15:09:41,442 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 15:09:41,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:41,626 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:41,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1637323657, now seen corresponding path program 1 times [2024-10-15 15:09:41,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:41,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208314783] [2024-10-15 15:09:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:09:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:09:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208314783] [2024-10-15 15:09:41,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208314783] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:41,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474594059] [2024-10-15 15:09:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:41,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:41,871 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) [2024-10-15 15:09:41,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:09:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:41,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:09:41,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:09:41,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:09:42,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474594059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:42,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:42,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2024-10-15 15:09:42,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641348284] [2024-10-15 15:09:42,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:42,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 15:09:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 15:09:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-15 15:09:42,163 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:09:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:42,359 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2024-10-15 15:09:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:09:42,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2024-10-15 15:09:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:42,361 INFO L225 Difference]: With dead ends: 81 [2024-10-15 15:09:42,361 INFO L226 Difference]: Without dead ends: 72 [2024-10-15 15:09:42,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-10-15 15:09:42,362 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:42,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:09:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-15 15:09:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2024-10-15 15:09:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2024-10-15 15:09:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2024-10-15 15:09:42,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 39 [2024-10-15 15:09:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:42,381 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2024-10-15 15:09:42,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:09:42,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2024-10-15 15:09:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 15:09:42,383 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:42,383 INFO L215 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] [2024-10-15 15:09:42,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:09:42,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 15:09:42,584 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:42,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 514532823, now seen corresponding path program 1 times [2024-10-15 15:09:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:42,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912004311] [2024-10-15 15:09:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:42,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:09:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:09:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912004311] [2024-10-15 15:09:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912004311] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534980344] [2024-10-15 15:09:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:42,820 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) [2024-10-15 15:09:42,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:09:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:42,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-15 15:09:42,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:09:42,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:09:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534980344] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:43,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2024-10-15 15:09:43,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808444491] [2024-10-15 15:09:43,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:43,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 15:09:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 15:09:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:09:43,638 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:09:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:43,922 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-10-15 15:09:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-15 15:09:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 39 [2024-10-15 15:09:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:43,923 INFO L225 Difference]: With dead ends: 91 [2024-10-15 15:09:43,924 INFO L226 Difference]: Without dead ends: 87 [2024-10-15 15:09:43,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:09:43,925 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:43,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:09:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-15 15:09:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2024-10-15 15:09:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (27), 17 states have call predecessors, (27), 12 states have call successors, (27) [2024-10-15 15:09:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-10-15 15:09:43,953 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 39 [2024-10-15 15:09:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:43,954 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-10-15 15:09:43,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:09:43,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-10-15 15:09:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 15:09:43,957 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:43,957 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:43,974 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 15:09:44,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:44,162 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:44,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 813588075, now seen corresponding path program 1 times [2024-10-15 15:09:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:44,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001611065] [2024-10-15 15:09:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:09:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:09:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001611065] [2024-10-15 15:09:44,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001611065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:44,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501988172] [2024-10-15 15:09:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:44,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:44,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:44,422 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) [2024-10-15 15:09:44,423 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:09:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:44,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-15 15:09:44,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:09:44,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:09:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501988172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:45,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:45,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 22 [2024-10-15 15:09:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870841690] [2024-10-15 15:09:45,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:45,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 15:09:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 15:09:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:09:45,122 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 22 states, 20 states have (on average 2.45) internal successors, (49), 17 states have internal predecessors, (49), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-15 15:09:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:45,428 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2024-10-15 15:09:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:09:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 17 states have internal predecessors, (49), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2024-10-15 15:09:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:45,430 INFO L225 Difference]: With dead ends: 84 [2024-10-15 15:09:45,430 INFO L226 Difference]: Without dead ends: 80 [2024-10-15 15:09:45,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-10-15 15:09:45,431 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:45,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 271 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:09:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-15 15:09:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2024-10-15 15:09:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 12 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (20), 14 states have call predecessors, (20), 11 states have call successors, (20) [2024-10-15 15:09:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-10-15 15:09:45,451 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 40 [2024-10-15 15:09:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:45,451 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-10-15 15:09:45,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 17 states have internal predecessors, (49), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-15 15:09:45,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-10-15 15:09:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 15:09:45,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:45,452 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-10-15 15:09:45,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:09:45,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-15 15:09:45,653 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:45,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1812824075, now seen corresponding path program 1 times [2024-10-15 15:09:45,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:45,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326973742] [2024-10-15 15:09:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:45,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:09:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 15:09:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326973742] [2024-10-15 15:09:45,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326973742] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:45,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703805200] [2024-10-15 15:09:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:45,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:45,938 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) [2024-10-15 15:09:45,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:09:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:45,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-15 15:09:45,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 15:09:46,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:09:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:09:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703805200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:09:46,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:09:46,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 22 [2024-10-15 15:09:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146859870] [2024-10-15 15:09:46,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:09:46,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 15:09:46,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:09:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 15:09:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:09:46,919 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-15 15:09:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:09:47,209 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2024-10-15 15:09:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:09:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2024-10-15 15:09:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:09:47,211 INFO L225 Difference]: With dead ends: 90 [2024-10-15 15:09:47,211 INFO L226 Difference]: Without dead ends: 86 [2024-10-15 15:09:47,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-10-15 15:09:47,212 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:09:47,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 256 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:09:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-15 15:09:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2024-10-15 15:09:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 12 states have call successors, (12), 6 states have call predecessors, (12), 11 states have return successors, (23), 17 states have call predecessors, (23), 11 states have call successors, (23) [2024-10-15 15:09:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2024-10-15 15:09:47,226 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 47 [2024-10-15 15:09:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:09:47,226 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2024-10-15 15:09:47,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-15 15:09:47,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2024-10-15 15:09:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:09:47,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:09:47,228 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:09:47,246 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:09:47,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 15:09:47,433 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:09:47,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:09:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -740789303, now seen corresponding path program 2 times [2024-10-15 15:09:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:09:47,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476446407] [2024-10-15 15:09:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:09:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:09:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:09:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:09:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:09:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:09:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:09:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:09:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:09:47,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:09:47,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476446407] [2024-10-15 15:09:47,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476446407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:09:47,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960689233] [2024-10-15 15:09:47,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:09:47,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:09:47,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:09:47,821 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) [2024-10-15 15:09:47,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:09:47,887 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:09:47,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:09:47,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:09:47,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:09:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:09:48,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:16,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960689233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:16,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:12:16,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2024-10-15 15:12:16,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098554345] [2024-10-15 15:12:16,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:16,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 15:12:16,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 15:12:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=642, Unknown=33, NotChecked=0, Total=756 [2024-10-15 15:12:16,600 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-15 15:12:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:18,086 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-10-15 15:12:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:12:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 54 [2024-10-15 15:12:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:18,087 INFO L225 Difference]: With dead ends: 102 [2024-10-15 15:12:18,087 INFO L226 Difference]: Without dead ends: 98 [2024-10-15 15:12:18,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 147.7s TimeCoverageRelationStatistics Valid=137, Invalid=952, Unknown=33, NotChecked=0, Total=1122 [2024-10-15 15:12:18,089 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:18,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 447 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 15:12:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-15 15:12:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-10-15 15:12:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 13 states have call successors, (13), 6 states have call predecessors, (13), 15 states have return successors, (34), 21 states have call predecessors, (34), 12 states have call successors, (34) [2024-10-15 15:12:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2024-10-15 15:12:18,107 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 54 [2024-10-15 15:12:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:18,107 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2024-10-15 15:12:18,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-15 15:12:18,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2024-10-15 15:12:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:12:18,108 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:18,108 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-15 15:12:18,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:12:18,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:18,309 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:18,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1112627139, now seen corresponding path program 2 times [2024-10-15 15:12:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:18,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43053188] [2024-10-15 15:12:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:18,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:18,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:18,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:18,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:18,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:12:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:19,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:19,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:12:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43053188] [2024-10-15 15:12:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43053188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214994275] [2024-10-15 15:12:19,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:12:19,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:19,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:19,466 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) [2024-10-15 15:12:19,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:12:19,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:12:19,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:19,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 15:12:19,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-15 15:12:19,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:12:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214994275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:12:21,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:12:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2024-10-15 15:12:21,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085768049] [2024-10-15 15:12:21,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:21,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:12:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:12:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:12:21,136 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-15 15:12:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:22,094 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2024-10-15 15:12:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:12:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 46 [2024-10-15 15:12:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:22,095 INFO L225 Difference]: With dead ends: 98 [2024-10-15 15:12:22,095 INFO L226 Difference]: Without dead ends: 89 [2024-10-15 15:12:22,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:12:22,096 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:22,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 239 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 15:12:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-15 15:12:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2024-10-15 15:12:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 13 states have call successors, (13), 6 states have call predecessors, (13), 15 states have return successors, (33), 20 states have call predecessors, (33), 12 states have call successors, (33) [2024-10-15 15:12:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-10-15 15:12:22,120 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 46 [2024-10-15 15:12:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:22,121 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-10-15 15:12:22,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-15 15:12:22,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-10-15 15:12:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 15:12:22,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:22,122 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-10-15 15:12:22,140 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:12:22,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:22,323 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:22,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 409599947, now seen corresponding path program 3 times [2024-10-15 15:12:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383082397] [2024-10-15 15:12:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:22,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:22,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:22,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:22,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:22,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:12:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:23,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:12:23,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383082397] [2024-10-15 15:12:23,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383082397] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794029157] [2024-10-15 15:12:23,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:12:23,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:23,260 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) [2024-10-15 15:12:23,261 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:12:23,336 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 15:12:23,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:23,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 15:12:23,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:12:24,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:12:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794029157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:12:27,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:12:27,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 34 [2024-10-15 15:12:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731523000] [2024-10-15 15:12:27,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:27,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 15:12:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 15:12:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:12:27,151 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 12 states have call successors, (14) [2024-10-15 15:12:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:28,915 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2024-10-15 15:12:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:12:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 12 states have call successors, (14) Word has length 47 [2024-10-15 15:12:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:28,917 INFO L225 Difference]: With dead ends: 132 [2024-10-15 15:12:28,917 INFO L226 Difference]: Without dead ends: 128 [2024-10-15 15:12:28,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 15:12:28,918 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:28,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 485 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 15:12:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-15 15:12:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2024-10-15 15:12:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 13 states have call successors, (13), 6 states have call predecessors, (13), 18 states have return successors, (41), 23 states have call predecessors, (41), 12 states have call successors, (41) [2024-10-15 15:12:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2024-10-15 15:12:28,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 47 [2024-10-15 15:12:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:28,953 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2024-10-15 15:12:28,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 12 states have call successors, (14) [2024-10-15 15:12:28,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2024-10-15 15:12:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 15:12:28,955 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:28,955 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:12:28,973 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 15:12:29,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 15:12:29,160 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:29,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash -315864469, now seen corresponding path program 3 times [2024-10-15 15:12:29,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:29,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188220076] [2024-10-15 15:12:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:12:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-15 15:12:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188220076] [2024-10-15 15:12:29,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188220076] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867646536] [2024-10-15 15:12:29,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:12:29,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:29,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:29,869 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) [2024-10-15 15:12:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:12:29,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 15:12:29,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:29,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 15:12:29,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:12:30,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:12:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867646536] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:12:34,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:12:34,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2024-10-15 15:12:34,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048562725] [2024-10-15 15:12:34,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:34,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 15:12:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 15:12:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:12:34,626 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (15), 10 states have call predecessors, (15), 14 states have call successors, (15) [2024-10-15 15:12:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:36,685 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2024-10-15 15:12:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:12:36,685 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (15), 10 states have call predecessors, (15), 14 states have call successors, (15) Word has length 47 [2024-10-15 15:12:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:36,686 INFO L225 Difference]: With dead ends: 115 [2024-10-15 15:12:36,687 INFO L226 Difference]: Without dead ends: 111 [2024-10-15 15:12:36,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 15:12:36,688 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:36,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 460 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-15 15:12:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-15 15:12:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2024-10-15 15:12:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 19 states have return successors, (44), 24 states have call predecessors, (44), 12 states have call successors, (44) [2024-10-15 15:12:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2024-10-15 15:12:36,720 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 47 [2024-10-15 15:12:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:36,721 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2024-10-15 15:12:36,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (15), 10 states have call predecessors, (15), 14 states have call successors, (15) [2024-10-15 15:12:36,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2024-10-15 15:12:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 15:12:36,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:36,723 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-15 15:12:36,740 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 15:12:36,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 15:12:36,924 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:36,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1839407255, now seen corresponding path program 4 times [2024-10-15 15:12:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:36,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017522193] [2024-10-15 15:12:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:37,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 15:12:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:38,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:12:38,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:38,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017522193] [2024-10-15 15:12:38,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017522193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:38,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201674168] [2024-10-15 15:12:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:12:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:38,230 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) [2024-10-15 15:12:38,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:12:38,304 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:12:38,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:38,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:12:38,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:12:39,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-15 15:12:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201674168] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:12:45,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:12:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 36 [2024-10-15 15:12:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324717771] [2024-10-15 15:12:45,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:45,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 15:12:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 15:12:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:12:45,130 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-15 15:12:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:47,898 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2024-10-15 15:12:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:12:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) Word has length 55 [2024-10-15 15:12:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:47,900 INFO L225 Difference]: With dead ends: 126 [2024-10-15 15:12:47,900 INFO L226 Difference]: Without dead ends: 122 [2024-10-15 15:12:47,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 15:12:47,901 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:47,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 459 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-15 15:12:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-15 15:12:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2024-10-15 15:12:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 6 states have call predecessors, (12), 13 states have return successors, (25), 16 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-15 15:12:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-10-15 15:12:47,922 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 55 [2024-10-15 15:12:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:47,922 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-10-15 15:12:47,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-15 15:12:47,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-10-15 15:12:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:12:47,923 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:47,924 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:12:47,936 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 15:12:48,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 15:12:48,124 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:48,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1099967369, now seen corresponding path program 5 times [2024-10-15 15:12:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:48,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300311324] [2024-10-15 15:12:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:12:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:48,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:49,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:12:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300311324] [2024-10-15 15:12:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300311324] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833933058] [2024-10-15 15:12:49,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 15:12:49,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:49,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:12:49,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:12:49,321 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 15:12:49,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:49,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 15:12:49,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-15 15:12:50,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:12:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 15:12:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833933058] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:12:54,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:12:54,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2024-10-15 15:12:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305562102] [2024-10-15 15:12:54,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:12:54,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 15:12:54,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:12:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 15:12:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:12:54,059 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-15 15:12:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:12:55,781 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2024-10-15 15:12:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:12:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) Word has length 54 [2024-10-15 15:12:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:12:55,783 INFO L225 Difference]: With dead ends: 92 [2024-10-15 15:12:55,783 INFO L226 Difference]: Without dead ends: 83 [2024-10-15 15:12:55,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 15:12:55,784 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:12:55,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 399 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-15 15:12:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-15 15:12:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-10-15 15:12:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 12 states have call successors, (12), 6 states have call predecessors, (12), 13 states have return successors, (25), 17 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-15 15:12:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2024-10-15 15:12:55,810 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 54 [2024-10-15 15:12:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:12:55,810 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2024-10-15 15:12:55,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-15 15:12:55,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2024-10-15 15:12:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:12:55,811 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:12:55,811 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:12:55,823 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 15:12:56,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:56,012 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:12:56,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:12:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2071268055, now seen corresponding path program 4 times [2024-10-15 15:12:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:12:56,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792496330] [2024-10-15 15:12:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:12:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:12:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:12:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:12:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:12:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-15 15:12:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:56,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:12:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:12:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:12:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:12:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792496330] [2024-10-15 15:12:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792496330] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:12:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180178361] [2024-10-15 15:12:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:12:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:12:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:12:57,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:12:57,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 15:12:57,145 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:12:57,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:12:57,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:12:57,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:12:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:12:57,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:13:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180178361] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:01,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2024-10-15 15:13:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058480479] [2024-10-15 15:13:01,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:01,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 15:13:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 15:13:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-10-15 15:13:01,328 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (15), 8 states have call predecessors, (15), 12 states have call successors, (15) [2024-10-15 15:13:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:03,551 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2024-10-15 15:13:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:13:03,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (15), 8 states have call predecessors, (15), 12 states have call successors, (15) Word has length 54 [2024-10-15 15:13:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:03,552 INFO L225 Difference]: With dead ends: 100 [2024-10-15 15:13:03,552 INFO L226 Difference]: Without dead ends: 96 [2024-10-15 15:13:03,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:13:03,553 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:03,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 522 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-15 15:13:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-15 15:13:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2024-10-15 15:13:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 12 states have call successors, (12), 6 states have call predecessors, (12), 13 states have return successors, (25), 18 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-15 15:13:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2024-10-15 15:13:03,579 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2024-10-15 15:13:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:03,579 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2024-10-15 15:13:03,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (15), 8 states have call predecessors, (15), 12 states have call successors, (15) [2024-10-15 15:13:03,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2024-10-15 15:13:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-15 15:13:03,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:03,583 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:03,598 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 15:13:03,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:03,784 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:03,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -377988163, now seen corresponding path program 6 times [2024-10-15 15:13:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744207817] [2024-10-15 15:13:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:03,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:03,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:13:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:04,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:04,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:04,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:05,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 15:13:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:05,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:05,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 15:13:05,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:05,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744207817] [2024-10-15 15:13:05,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744207817] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:05,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926101998] [2024-10-15 15:13:05,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 15:13:05,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:05,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:05,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:05,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 15:13:05,638 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 15:13:05,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:05,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 15:13:05,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:13:07,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:13:15,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926101998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:15,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:15,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 42 [2024-10-15 15:13:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251350511] [2024-10-15 15:13:15,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:15,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 15:13:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 15:13:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 15:13:15,773 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 13 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2024-10-15 15:13:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:20,191 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2024-10-15 15:13:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:13:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 13 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) Word has length 62 [2024-10-15 15:13:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:20,194 INFO L225 Difference]: With dead ends: 139 [2024-10-15 15:13:20,194 INFO L226 Difference]: Without dead ends: 135 [2024-10-15 15:13:20,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2024-10-15 15:13:20,196 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:20,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 734 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-10-15 15:13:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-15 15:13:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2024-10-15 15:13:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 12 states have call successors, (12), 6 states have call predecessors, (12), 15 states have return successors, (31), 21 states have call predecessors, (31), 11 states have call successors, (31) [2024-10-15 15:13:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2024-10-15 15:13:20,229 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 62 [2024-10-15 15:13:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:20,230 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2024-10-15 15:13:20,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 13 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2024-10-15 15:13:20,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2024-10-15 15:13:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-15 15:13:20,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:20,231 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:20,250 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-15 15:13:20,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:20,432 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:20,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1582685789, now seen corresponding path program 7 times [2024-10-15 15:13:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:20,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510861755] [2024-10-15 15:13:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:20,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:20,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:13:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:20,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:21,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:21,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:21,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 15:13:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:22,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:22,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:13:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510861755] [2024-10-15 15:13:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510861755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092851726] [2024-10-15 15:13:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 15:13:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:22,435 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:22,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 15:13:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:22,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-15 15:13:22,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:13:24,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:13:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092851726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:35,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 46 [2024-10-15 15:13:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293988128] [2024-10-15 15:13:35,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:35,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 15:13:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 15:13:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 15:13:35,727 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) [2024-10-15 15:13:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:41,284 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2024-10-15 15:13:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:13:41,285 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) Word has length 62 [2024-10-15 15:13:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:41,287 INFO L225 Difference]: With dead ends: 154 [2024-10-15 15:13:41,288 INFO L226 Difference]: Without dead ends: 150 [2024-10-15 15:13:41,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=386, Invalid=3036, Unknown=0, NotChecked=0, Total=3422 [2024-10-15 15:13:41,292 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:41,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 869 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-10-15 15:13:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-15 15:13:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2024-10-15 15:13:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.1) internal successors, (66), 58 states have internal predecessors, (66), 12 states have call successors, (12), 6 states have call predecessors, (12), 16 states have return successors, (34), 24 states have call predecessors, (34), 11 states have call successors, (34) [2024-10-15 15:13:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-10-15 15:13:41,328 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 62 [2024-10-15 15:13:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:41,329 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-10-15 15:13:41,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) [2024-10-15 15:13:41,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-10-15 15:13:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-15 15:13:41,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:41,330 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:41,345 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-15 15:13:41,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 15:13:41,531 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:41,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1743105565, now seen corresponding path program 8 times [2024-10-15 15:13:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:41,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133226639] [2024-10-15 15:13:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:41,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:41,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:13:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:41,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-15 15:13:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 15:13:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:42,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:13:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:13:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:13:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133226639] [2024-10-15 15:13:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133226639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:13:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256811340] [2024-10-15 15:13:43,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:13:43,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:13:43,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:13:43,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 15:13:43,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:13:43,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:13:43,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-15 15:13:43,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:13:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:13:45,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:13:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:13:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256811340] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:13:52,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:13:52,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 50 [2024-10-15 15:13:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669941809] [2024-10-15 15:13:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:13:52,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-15 15:13:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:13:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-15 15:13:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 15:13:52,970 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 50 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) [2024-10-15 15:13:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:13:57,641 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2024-10-15 15:13:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:13:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) Word has length 62 [2024-10-15 15:13:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:13:57,643 INFO L225 Difference]: With dead ends: 148 [2024-10-15 15:13:57,643 INFO L226 Difference]: Without dead ends: 144 [2024-10-15 15:13:57,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 15:13:57,645 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:13:57,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 811 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-15 15:13:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-15 15:13:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 91. [2024-10-15 15:13:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 12 states have call successors, (12), 6 states have call predecessors, (12), 17 states have return successors, (37), 24 states have call predecessors, (37), 11 states have call successors, (37) [2024-10-15 15:13:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-10-15 15:13:57,677 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 62 [2024-10-15 15:13:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:13:57,677 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-10-15 15:13:57,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (22), 15 states have call predecessors, (22), 17 states have call successors, (22) [2024-10-15 15:13:57,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-10-15 15:13:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-15 15:13:57,679 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:13:57,679 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:13:57,696 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 15:13:57,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:13:57,880 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:13:57,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:13:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -913631875, now seen corresponding path program 9 times [2024-10-15 15:13:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:13:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061098542] [2024-10-15 15:13:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:13:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:13:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,024 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:13:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:13:58,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:13:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat