./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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:37:25,956 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:37:25,999 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:37:26,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:37:26,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:37:26,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:37:26,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:37:26,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:37:26,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:37:26,038 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:37:26,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:37:26,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:37:26,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:37:26,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:37:26,041 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:37:26,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:37:26,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:37:26,042 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:37:26,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:37:26,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:37:26,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:37:26,043 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:37:26,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:37:26,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:37:26,045 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:37:26,045 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:37:26,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:37:26,046 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:37:26,046 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:37:26,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:37:26,046 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:37:26,046 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:37:26,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:37:26,047 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:37:26,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:37:26,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:37:26,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:37:26,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:37:26,060 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:37:26,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:37:26,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:37:26,061 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:37:26,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:37:26,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:37:26,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:37:26,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:37:26,295 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:37:26,296 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:37:26,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/gcd02.c [2024-09-18 16:37:27,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:37:27,629 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:37:27,629 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c [2024-09-18 16:37:27,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/637960566/c61b63304efa43dcabeed065ee3f7de1/FLAG0c3c203f7 [2024-09-18 16:37:28,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/637960566/c61b63304efa43dcabeed065ee3f7de1 [2024-09-18 16:37:28,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:37:28,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:37:28,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:37:28,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:37:28,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:37:28,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8468b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28, skipping insertion in model container [2024-09-18 16:37:28,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,091 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:37:28,199 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] [2024-09-18 16:37:28,211 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] [2024-09-18 16:37:28,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:37:28,218 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:37:28,229 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] [2024-09-18 16:37:28,233 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] [2024-09-18 16:37:28,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:37:28,246 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:37:28,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28 WrapperNode [2024-09-18 16:37:28,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:37:28,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:37:28,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:37:28,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:37:28,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,262 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:37:28,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:37:28,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:37:28,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:37:28,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:37:28,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,298 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]. [2024-09-18 16:37:28,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,300 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:37:28,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:37:28,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:37:28,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:37:28,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (1/1) ... [2024-09-18 16:37:28,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:37:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:28,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:37:28,341 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 16:37:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:37:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2024-09-18 16:37:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:37:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:37:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2024-09-18 16:37:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2024-09-18 16:37:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:37:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:37:28,422 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:37:28,424 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:37:28,583 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-18 16:37:28,584 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:37:28,604 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:37:28,605 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-18 16:37:28,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:37:28 BoogieIcfgContainer [2024-09-18 16:37:28,605 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:37:28,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:37:28,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:37:28,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:37:28,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:37:28" (1/3) ... [2024-09-18 16:37:28,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcde355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:37:28, skipping insertion in model container [2024-09-18 16:37:28,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:37:28" (2/3) ... [2024-09-18 16:37:28,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcde355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:37:28, skipping insertion in model container [2024-09-18 16:37:28,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:37:28" (3/3) ... [2024-09-18 16:37:28,612 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2024-09-18 16:37:28,624 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:37:28,624 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-18 16:37:28,668 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:37:28,673 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f4eced0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:37:28,673 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-18 16:37:28,676 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) [2024-09-18 16:37:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-18 16:37:28,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:28,684 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:28,685 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:28,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1001653490, now seen corresponding path program 1 times [2024-09-18 16:37:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420645398] [2024-09-18 16:37:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:28,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:37:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420645398] [2024-09-18 16:37:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420645398] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:28,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:28,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:37:28,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973461890] [2024-09-18 16:37:28,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:28,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:37:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:37:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:37:28,988 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) [2024-09-18 16:37:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:29,087 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2024-09-18 16:37:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:37:29,090 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 [2024-09-18 16:37:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:29,097 INFO L225 Difference]: With dead ends: 85 [2024-09-18 16:37:29,097 INFO L226 Difference]: Without dead ends: 48 [2024-09-18 16:37:29,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:37:29,101 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-18 16:37:29,102 INFO L435 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] [2024-09-18 16:37:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-18 16:37:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-09-18 16:37:29,134 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) [2024-09-18 16:37:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-18 16:37:29,137 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-18 16:37:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:29,138 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-18 16:37:29,138 INFO L475 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) [2024-09-18 16:37:29,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-18 16:37:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:37:29,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:29,141 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:29,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:37:29,141 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:29,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2101058803, now seen corresponding path program 1 times [2024-09-18 16:37:29,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:29,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597336551] [2024-09-18 16:37:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:29,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:37:29,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597336551] [2024-09-18 16:37:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597336551] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:29,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:29,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 16:37:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209105107] [2024-09-18 16:37:29,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:29,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 16:37:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 16:37:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:37:29,277 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) [2024-09-18 16:37:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:29,393 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2024-09-18 16:37:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:37:29,394 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 [2024-09-18 16:37:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:29,395 INFO L225 Difference]: With dead ends: 68 [2024-09-18 16:37:29,395 INFO L226 Difference]: Without dead ends: 66 [2024-09-18 16:37:29,395 INFO L433 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 [2024-09-18 16:37:29,396 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-18 16:37:29,397 INFO L435 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] [2024-09-18 16:37:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-18 16:37:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-09-18 16:37:29,420 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) [2024-09-18 16:37:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-18 16:37:29,422 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 17 [2024-09-18 16:37:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:29,431 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-18 16:37:29,431 INFO L475 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) [2024-09-18 16:37:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-18 16:37:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:37:29,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:29,432 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:29,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:37:29,432 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:29,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2098228658, now seen corresponding path program 1 times [2024-09-18 16:37:29,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:29,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509731915] [2024-09-18 16:37:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:37:29,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509731915] [2024-09-18 16:37:29,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509731915] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:29,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:29,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:37:29,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627074669] [2024-09-18 16:37:29,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:29,536 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:37:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:37:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:37:29,537 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) [2024-09-18 16:37:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:29,636 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2024-09-18 16:37:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:37:29,637 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 [2024-09-18 16:37:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:29,638 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:37:29,640 INFO L226 Difference]: Without dead ends: 64 [2024-09-18 16:37:29,640 INFO L433 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 [2024-09-18 16:37:29,642 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-18 16:37:29,643 INFO L435 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] [2024-09-18 16:37:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-18 16:37:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-09-18 16:37:29,661 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) [2024-09-18 16:37:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-09-18 16:37:29,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 17 [2024-09-18 16:37:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:29,665 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-09-18 16:37:29,665 INFO L475 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) [2024-09-18 16:37:29,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-09-18 16:37:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 16:37:29,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:29,666 INFO L216 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] [2024-09-18 16:37:29,666 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:37:29,667 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1634934741, now seen corresponding path program 1 times [2024-09-18 16:37:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397831223] [2024-09-18 16:37:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 16:37:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:37:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397831223] [2024-09-18 16:37:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397831223] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:29,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:29,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 16:37:29,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137977883] [2024-09-18 16:37:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:29,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 16:37:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 16:37:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 16:37:29,744 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) [2024-09-18 16:37:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:29,764 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-09-18 16:37:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 16:37:29,764 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 [2024-09-18 16:37:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:29,765 INFO L225 Difference]: With dead ends: 58 [2024-09-18 16:37:29,765 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 16:37:29,765 INFO L433 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 [2024-09-18 16:37:29,766 INFO L434 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 [2024-09-18 16:37:29,766 INFO L435 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] [2024-09-18 16:37:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 16:37:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-18 16:37:29,778 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) [2024-09-18 16:37:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-18 16:37:29,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 23 [2024-09-18 16:37:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:29,780 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-18 16:37:29,780 INFO L475 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) [2024-09-18 16:37:29,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-18 16:37:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:37:29,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:29,783 INFO L216 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] [2024-09-18 16:37:29,783 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-18 16:37:29,783 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:29,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -146564981, now seen corresponding path program 1 times [2024-09-18 16:37:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:29,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308089084] [2024-09-18 16:37:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 16:37:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:37:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308089084] [2024-09-18 16:37:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308089084] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:29,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:29,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:37:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520764781] [2024-09-18 16:37:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:29,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:37:29,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:37:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:37:29,935 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) [2024-09-18 16:37:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:30,064 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-18 16:37:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:37:30,064 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 [2024-09-18 16:37:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:30,065 INFO L225 Difference]: With dead ends: 72 [2024-09-18 16:37:30,065 INFO L226 Difference]: Without dead ends: 68 [2024-09-18 16:37:30,066 INFO L433 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 [2024-09-18 16:37:30,066 INFO L434 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 [2024-09-18 16:37:30,067 INFO L435 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] [2024-09-18 16:37:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-18 16:37:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-09-18 16:37:30,088 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) [2024-09-18 16:37:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2024-09-18 16:37:30,089 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 24 [2024-09-18 16:37:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:30,089 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2024-09-18 16:37:30,089 INFO L475 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) [2024-09-18 16:37:30,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2024-09-18 16:37:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 16:37:30,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:30,092 INFO L216 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] [2024-09-18 16:37:30,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-18 16:37:30,093 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:30,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash -698589569, now seen corresponding path program 1 times [2024-09-18 16:37:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:30,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292563290] [2024-09-18 16:37:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 16:37:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:37:30,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292563290] [2024-09-18 16:37:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292563290] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:30,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:30,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:37:30,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227796564] [2024-09-18 16:37:30,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:30,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:37:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:37:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:37:30,188 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) [2024-09-18 16:37:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:30,220 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-09-18 16:37:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:37:30,221 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 [2024-09-18 16:37:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:30,223 INFO L225 Difference]: With dead ends: 67 [2024-09-18 16:37:30,225 INFO L226 Difference]: Without dead ends: 58 [2024-09-18 16:37:30,226 INFO L433 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 [2024-09-18 16:37:30,226 INFO L434 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 [2024-09-18 16:37:30,227 INFO L435 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] [2024-09-18 16:37:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-18 16:37:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-18 16:37:30,238 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) [2024-09-18 16:37:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-09-18 16:37:30,239 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 30 [2024-09-18 16:37:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:30,239 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-09-18 16:37:30,239 INFO L475 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) [2024-09-18 16:37:30,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-09-18 16:37:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 16:37:30,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:30,244 INFO L216 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] [2024-09-18 16:37:30,244 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-18 16:37:30,244 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:30,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1845010923, now seen corresponding path program 1 times [2024-09-18 16:37:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619191827] [2024-09-18 16:37:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 16:37:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:37:30,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619191827] [2024-09-18 16:37:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619191827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930328562] [2024-09-18 16:37:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:30,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:30,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:37:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:30,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 16:37:30,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:37:30,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:37:30,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930328562] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:30,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2024-09-18 16:37:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204135840] [2024-09-18 16:37:30,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:30,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 16:37:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 16:37:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:37:30,728 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) [2024-09-18 16:37:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:30,885 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-09-18 16:37:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:37:30,887 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 [2024-09-18 16:37:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:30,887 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:37:30,889 INFO L226 Difference]: Without dead ends: 58 [2024-09-18 16:37:30,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:37:30,890 INFO L434 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 [2024-09-18 16:37:30,890 INFO L435 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] [2024-09-18 16:37:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-18 16:37:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-18 16:37:30,900 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) [2024-09-18 16:37:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-18 16:37:30,900 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 31 [2024-09-18 16:37:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:30,901 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-18 16:37:30,901 INFO L475 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) [2024-09-18 16:37:30,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-18 16:37:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:37:30,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:30,902 INFO L216 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] [2024-09-18 16:37:30,915 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:37:31,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:37:31,107 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:31,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2081598593, now seen corresponding path program 1 times [2024-09-18 16:37:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:31,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455773370] [2024-09-18 16:37:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:37:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 16:37:31,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455773370] [2024-09-18 16:37:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455773370] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:37:31,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:37:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-18 16:37:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717624686] [2024-09-18 16:37:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:37:31,240 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:37:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:37:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:37:31,241 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) [2024-09-18 16:37:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:31,347 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2024-09-18 16:37:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:37:31,347 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 [2024-09-18 16:37:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:31,348 INFO L225 Difference]: With dead ends: 77 [2024-09-18 16:37:31,348 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 16:37:31,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:37:31,349 INFO L434 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 [2024-09-18 16:37:31,349 INFO L435 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] [2024-09-18 16:37:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 16:37:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2024-09-18 16:37:31,359 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) [2024-09-18 16:37:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-18 16:37:31,360 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 32 [2024-09-18 16:37:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:31,360 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-18 16:37:31,360 INFO L475 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) [2024-09-18 16:37:31,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-18 16:37:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:37:31,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:31,361 INFO L216 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] [2024-09-18 16:37:31,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-18 16:37:31,362 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:31,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1569823201, now seen corresponding path program 1 times [2024-09-18 16:37:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96363981] [2024-09-18 16:37:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:37:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 16:37:31,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:31,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96363981] [2024-09-18 16:37:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96363981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156971827] [2024-09-18 16:37:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:31,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:31,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:37:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:31,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 16:37:31,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 16:37:31,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 16:37:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156971827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:31,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-18 16:37:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605035] [2024-09-18 16:37:31,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:31,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:37:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:37:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:37:31,879 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) [2024-09-18 16:37:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:32,064 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2024-09-18 16:37:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 16:37:32,065 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 [2024-09-18 16:37:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:32,065 INFO L225 Difference]: With dead ends: 85 [2024-09-18 16:37:32,065 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 16:37:32,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-09-18 16:37:32,066 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:37:32,066 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 256 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:37:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 16:37:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2024-09-18 16:37:32,083 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) [2024-09-18 16:37:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-09-18 16:37:32,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2024-09-18 16:37:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:32,086 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-09-18 16:37:32,086 INFO L475 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) [2024-09-18 16:37:32,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-09-18 16:37:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 16:37:32,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:32,087 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:32,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:37:32,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:32,288 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:32,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1637323657, now seen corresponding path program 1 times [2024-09-18 16:37:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:32,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984326240] [2024-09-18 16:37:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:37:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:37:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984326240] [2024-09-18 16:37:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984326240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023872362] [2024-09-18 16:37:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:32,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:32,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:32,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:37:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:32,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 16:37:32,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:37:32,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:37:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023872362] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:32,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2024-09-18 16:37:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691099095] [2024-09-18 16:37:32,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:32,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 16:37:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 16:37:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:37:32,705 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) [2024-09-18 16:37:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:32,844 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2024-09-18 16:37:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:37:32,844 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 [2024-09-18 16:37:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:32,846 INFO L225 Difference]: With dead ends: 81 [2024-09-18 16:37:32,846 INFO L226 Difference]: Without dead ends: 72 [2024-09-18 16:37:32,846 INFO L433 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 [2024-09-18 16:37:32,846 INFO L434 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 [2024-09-18 16:37:32,846 INFO L435 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] [2024-09-18 16:37:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-18 16:37:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2024-09-18 16:37:32,856 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) [2024-09-18 16:37:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2024-09-18 16:37:32,856 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 39 [2024-09-18 16:37:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:32,857 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2024-09-18 16:37:32,857 INFO L475 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) [2024-09-18 16:37:32,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2024-09-18 16:37:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 16:37:32,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:32,858 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:32,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:37:33,061 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 16:37:33,062 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:33,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash 514532823, now seen corresponding path program 1 times [2024-09-18 16:37:33,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:33,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374363596] [2024-09-18 16:37:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:33,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:37:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:37:33,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374363596] [2024-09-18 16:37:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374363596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758467805] [2024-09-18 16:37:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:33,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:33,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:33,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:37:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:33,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 16:37:33,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:37:33,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 16:37:33,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758467805] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:33,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:33,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2024-09-18 16:37:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736593854] [2024-09-18 16:37:33,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:33,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:37:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:37:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:37:33,813 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) [2024-09-18 16:37:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:34,028 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-09-18 16:37:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 16:37:34,029 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 [2024-09-18 16:37:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:34,030 INFO L225 Difference]: With dead ends: 91 [2024-09-18 16:37:34,030 INFO L226 Difference]: Without dead ends: 87 [2024-09-18 16:37:34,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:37:34,030 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-18 16:37:34,031 INFO L435 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] [2024-09-18 16:37:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-18 16:37:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2024-09-18 16:37:34,055 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) [2024-09-18 16:37:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-09-18 16:37:34,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 39 [2024-09-18 16:37:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:34,056 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-09-18 16:37:34,056 INFO L475 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) [2024-09-18 16:37:34,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-09-18 16:37:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 16:37:34,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:34,058 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:34,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:37:34,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:34,262 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:34,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 813588075, now seen corresponding path program 1 times [2024-09-18 16:37:34,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:34,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368122876] [2024-09-18 16:37:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:34,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:37:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:37:34,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:34,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368122876] [2024-09-18 16:37:34,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368122876] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:34,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656359769] [2024-09-18 16:37:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:34,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:34,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:37:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:34,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 16:37:34,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:37:34,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:37:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656359769] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:34,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:34,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 22 [2024-09-18 16:37:34,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842970428] [2024-09-18 16:37:34,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:34,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 16:37:34,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 16:37:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:37:34,987 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) [2024-09-18 16:37:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:35,215 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2024-09-18 16:37:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:37:35,215 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 [2024-09-18 16:37:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:35,217 INFO L225 Difference]: With dead ends: 84 [2024-09-18 16:37:35,217 INFO L226 Difference]: Without dead ends: 80 [2024-09-18 16:37:35,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:37:35,218 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-18 16:37:35,218 INFO L435 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] [2024-09-18 16:37:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-18 16:37:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2024-09-18 16:37:35,232 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) [2024-09-18 16:37:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-09-18 16:37:35,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 40 [2024-09-18 16:37:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:35,233 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-09-18 16:37:35,233 INFO L475 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) [2024-09-18 16:37:35,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-09-18 16:37:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:37:35,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:35,233 INFO L216 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] [2024-09-18 16:37:35,247 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:37:35,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 16:37:35,434 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:35,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1812824075, now seen corresponding path program 1 times [2024-09-18 16:37:35,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:35,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137849985] [2024-09-18 16:37:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:35,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:37:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 16:37:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137849985] [2024-09-18 16:37:35,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137849985] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398158424] [2024-09-18 16:37:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:35,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:35,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:37:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:35,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 16:37:35,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 16:37:35,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:37:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:37:36,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398158424] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:37:36,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:37:36,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 22 [2024-09-18 16:37:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933114690] [2024-09-18 16:37:36,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:37:36,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 16:37:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:37:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 16:37:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:37:36,354 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) [2024-09-18 16:37:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:37:36,557 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2024-09-18 16:37:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:37:36,557 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 [2024-09-18 16:37:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:37:36,558 INFO L225 Difference]: With dead ends: 90 [2024-09-18 16:37:36,558 INFO L226 Difference]: Without dead ends: 86 [2024-09-18 16:37:36,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-09-18 16:37:36,559 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:37:36,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 256 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:37:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-18 16:37:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2024-09-18 16:37:36,568 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) [2024-09-18 16:37:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2024-09-18 16:37:36,569 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 47 [2024-09-18 16:37:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:37:36,569 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2024-09-18 16:37:36,569 INFO L475 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) [2024-09-18 16:37:36,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2024-09-18 16:37:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:37:36,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:37:36,570 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:37:36,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 16:37:36,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 16:37:36,775 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:37:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:37:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash -740789303, now seen corresponding path program 2 times [2024-09-18 16:37:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:37:36,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053576763] [2024-09-18 16:37:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:37:36,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:37:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:36,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:37:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:36,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:37:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:36,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:36,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:37:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:36,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:37:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:37,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:37,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:37:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:37:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:37:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:37:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053576763] [2024-09-18 16:37:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053576763] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:37:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010491411] [2024-09-18 16:37:37,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:37:37,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:37:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:37:37,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:37:37,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:37:37,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:37:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:37:37,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 16:37:37,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:37:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:37:37,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:39:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010491411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:39:53,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:39:53,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2024-09-18 16:39:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183242810] [2024-09-18 16:39:53,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:39:53,958 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:39:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:39:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:39:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=643, Unknown=32, NotChecked=0, Total=756 [2024-09-18 16:39:53,959 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) [2024-09-18 16:39:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:39:54,908 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-09-18 16:39:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:39:54,908 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 [2024-09-18 16:39:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:39:54,909 INFO L225 Difference]: With dead ends: 102 [2024-09-18 16:39:54,909 INFO L226 Difference]: Without dead ends: 98 [2024-09-18 16:39:54,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=137, Invalid=953, Unknown=32, NotChecked=0, Total=1122 [2024-09-18 16:39:54,910 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 16:39:54,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 447 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 16:39:54,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-18 16:39:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-09-18 16:39:54,924 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) [2024-09-18 16:39:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2024-09-18 16:39:54,924 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 54 [2024-09-18 16:39:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:39:54,925 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2024-09-18 16:39:54,925 INFO L475 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) [2024-09-18 16:39:54,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:39:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2024-09-18 16:39:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:39:54,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:39:54,926 INFO L216 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] [2024-09-18 16:39:54,938 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:39:55,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:39:55,127 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:39:55,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:39:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1112627139, now seen corresponding path program 2 times [2024-09-18 16:39:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:39:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529862792] [2024-09-18 16:39:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:39:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:39:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:39:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:39:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:39:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:39:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:39:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:39:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:39:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:39:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529862792] [2024-09-18 16:39:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529862792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:39:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53955830] [2024-09-18 16:39:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:39:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:39:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:39:55,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:39:55,658 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:39:55,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:39:55,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:39:55,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 16:39:55,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:39:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 16:39:55,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:39:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:39:56,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53955830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:39:56,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:39:56,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2024-09-18 16:39:56,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280109327] [2024-09-18 16:39:56,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:39:56,821 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 16:39:56,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:39:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 16:39:56,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:39:56,822 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) [2024-09-18 16:39:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:39:57,528 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2024-09-18 16:39:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:39:57,529 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 [2024-09-18 16:39:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:39:57,530 INFO L225 Difference]: With dead ends: 98 [2024-09-18 16:39:57,530 INFO L226 Difference]: Without dead ends: 89 [2024-09-18 16:39:57,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-09-18 16:39:57,530 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:39:57,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 239 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:39:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-18 16:39:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2024-09-18 16:39:57,546 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) [2024-09-18 16:39:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-09-18 16:39:57,548 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 46 [2024-09-18 16:39:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:39:57,549 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-09-18 16:39:57,549 INFO L475 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) [2024-09-18 16:39:57,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:39:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-09-18 16:39:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:39:57,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:39:57,550 INFO L216 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] [2024-09-18 16:39:57,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 16:39:57,753 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:39:57,754 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:39:57,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:39:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash 409599947, now seen corresponding path program 3 times [2024-09-18 16:39:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:39:57,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410439738] [2024-09-18 16:39:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:39:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:39:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:57,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:39:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:57,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:39:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:57,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:39:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:58,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:39:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:58,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:39:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:58,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:39:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:39:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 16:39:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:39:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410439738] [2024-09-18 16:39:58,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410439738] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:39:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411289927] [2024-09-18 16:39:58,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:39:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:39:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:39:58,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:39:58,305 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:39:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 16:39:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:39:58,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 16:39:58,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:39:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:39:59,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:40:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411289927] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:00,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 34 [2024-09-18 16:40:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788320984] [2024-09-18 16:40:00,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:00,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 16:40:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 16:40:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 16:40:00,985 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) [2024-09-18 16:40:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:02,321 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2024-09-18 16:40:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 16:40:02,322 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 [2024-09-18 16:40:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:02,323 INFO L225 Difference]: With dead ends: 132 [2024-09-18 16:40:02,323 INFO L226 Difference]: Without dead ends: 128 [2024-09-18 16:40:02,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 16:40:02,324 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:02,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 485 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 16:40:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-18 16:40:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2024-09-18 16:40:02,345 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) [2024-09-18 16:40:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2024-09-18 16:40:02,346 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 47 [2024-09-18 16:40:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:02,346 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2024-09-18 16:40:02,346 INFO L475 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) [2024-09-18 16:40:02,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2024-09-18 16:40:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:40:02,347 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:02,348 INFO L216 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] [2024-09-18 16:40:02,360 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 16:40:02,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 16:40:02,548 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:02,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash -315864469, now seen corresponding path program 3 times [2024-09-18 16:40:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:02,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828297006] [2024-09-18 16:40:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:02,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:02,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:02,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:02,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:02,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:40:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:03,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 16:40:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:03,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828297006] [2024-09-18 16:40:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828297006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:03,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387570677] [2024-09-18 16:40:03,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:40:03,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:03,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:40:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:40:03,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 16:40:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:03,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 16:40:03,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:40:03,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:40:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387570677] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:05,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2024-09-18 16:40:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28653777] [2024-09-18 16:40:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:05,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-18 16:40:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-18 16:40:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 16:40:05,912 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) [2024-09-18 16:40:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:07,115 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2024-09-18 16:40:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:40:07,116 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 [2024-09-18 16:40:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:07,117 INFO L225 Difference]: With dead ends: 115 [2024-09-18 16:40:07,117 INFO L226 Difference]: Without dead ends: 111 [2024-09-18 16:40:07,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2024-09-18 16:40:07,118 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:07,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 460 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:40:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-18 16:40:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2024-09-18 16:40:07,134 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) [2024-09-18 16:40:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2024-09-18 16:40:07,135 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 47 [2024-09-18 16:40:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:07,136 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2024-09-18 16:40:07,136 INFO L475 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) [2024-09-18 16:40:07,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2024-09-18 16:40:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 16:40:07,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:07,140 INFO L216 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] [2024-09-18 16:40:07,152 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:07,341 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 16:40:07,342 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:07,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1839407255, now seen corresponding path program 4 times [2024-09-18 16:40:07,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:07,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695611389] [2024-09-18 16:40:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:07,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:40:07,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:07,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695611389] [2024-09-18 16:40:07,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695611389] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:07,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072435816] [2024-09-18 16:40:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:40:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:07,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:40:07,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 16:40:07,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:40:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:07,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 16:40:07,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:40:08,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 16:40:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072435816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:11,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 36 [2024-09-18 16:40:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431171733] [2024-09-18 16:40:11,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:11,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-18 16:40:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-18 16:40:11,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 16:40:11,676 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) [2024-09-18 16:40:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:13,169 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2024-09-18 16:40:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 16:40:13,170 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 [2024-09-18 16:40:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:13,171 INFO L225 Difference]: With dead ends: 126 [2024-09-18 16:40:13,171 INFO L226 Difference]: Without dead ends: 122 [2024-09-18 16:40:13,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 16:40:13,172 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:13,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 459 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:40:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-18 16:40:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2024-09-18 16:40:13,189 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) [2024-09-18 16:40:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-09-18 16:40:13,190 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 55 [2024-09-18 16:40:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:13,190 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-09-18 16:40:13,190 INFO L475 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) [2024-09-18 16:40:13,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-09-18 16:40:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:40:13,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:13,191 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:40:13,204 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:13,391 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 16:40:13,392 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:13,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1099967369, now seen corresponding path program 5 times [2024-09-18 16:40:13,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520814175] [2024-09-18 16:40:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:40:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:13,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:40:14,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:14,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520814175] [2024-09-18 16:40:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520814175] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218950869] [2024-09-18 16:40:14,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 16:40:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:14,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:14,033 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) [2024-09-18 16:40:14,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 16:40:14,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 16:40:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:14,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 16:40:14,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 16:40:14,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 16:40:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218950869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:16,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:16,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2024-09-18 16:40:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816052911] [2024-09-18 16:40:16,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:16,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 16:40:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 16:40:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 16:40:16,814 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) [2024-09-18 16:40:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:17,694 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2024-09-18 16:40:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:40:17,694 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 [2024-09-18 16:40:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:17,695 INFO L225 Difference]: With dead ends: 92 [2024-09-18 16:40:17,695 INFO L226 Difference]: Without dead ends: 83 [2024-09-18 16:40:17,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 16:40:17,696 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:17,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 399 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 16:40:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-18 16:40:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-18 16:40:17,714 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) [2024-09-18 16:40:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2024-09-18 16:40:17,715 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 54 [2024-09-18 16:40:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:17,715 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2024-09-18 16:40:17,715 INFO L475 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) [2024-09-18 16:40:17,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2024-09-18 16:40:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:40:17,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:17,716 INFO L216 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] [2024-09-18 16:40:17,729 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 16:40:17,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:17,916 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2071268055, now seen corresponding path program 4 times [2024-09-18 16:40:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808401747] [2024-09-18 16:40:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:17,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:17,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:40:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:40:18,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808401747] [2024-09-18 16:40:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808401747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779017885] [2024-09-18 16:40:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:40:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:18,404 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) [2024-09-18 16:40:18,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 16:40:18,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:40:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:18,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 16:40:18,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:40:18,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:40:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779017885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:21,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:21,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2024-09-18 16:40:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036604066] [2024-09-18 16:40:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:21,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:40:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:40:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:40:21,113 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) [2024-09-18 16:40:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:22,196 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2024-09-18 16:40:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:40:22,196 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 [2024-09-18 16:40:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:22,197 INFO L225 Difference]: With dead ends: 100 [2024-09-18 16:40:22,197 INFO L226 Difference]: Without dead ends: 96 [2024-09-18 16:40:22,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 16:40:22,198 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:22,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 522 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 16:40:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-18 16:40:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2024-09-18 16:40:22,214 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) [2024-09-18 16:40:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2024-09-18 16:40:22,214 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2024-09-18 16:40:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:22,214 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2024-09-18 16:40:22,214 INFO L475 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) [2024-09-18 16:40:22,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2024-09-18 16:40:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 16:40:22,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:22,215 INFO L216 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] [2024-09-18 16:40:22,228 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:22,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:22,416 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -377988163, now seen corresponding path program 6 times [2024-09-18 16:40:22,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:22,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307809756] [2024-09-18 16:40:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:22,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:22,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:23,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 16:40:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307809756] [2024-09-18 16:40:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307809756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536685264] [2024-09-18 16:40:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 16:40:23,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:23,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:23,080 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) [2024-09-18 16:40:23,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 16:40:23,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-18 16:40:23,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:23,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 16:40:23,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:40:23,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:40:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536685264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:27,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:27,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 42 [2024-09-18 16:40:27,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427059273] [2024-09-18 16:40:27,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:27,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-18 16:40:27,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:27,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-18 16:40:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 16:40:27,830 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) [2024-09-18 16:40:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:29,632 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2024-09-18 16:40:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 16:40:29,632 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 [2024-09-18 16:40:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:29,633 INFO L225 Difference]: With dead ends: 139 [2024-09-18 16:40:29,633 INFO L226 Difference]: Without dead ends: 135 [2024-09-18 16:40:29,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2024-09-18 16:40:29,634 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:29,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 734 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 16:40:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-18 16:40:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2024-09-18 16:40:29,657 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) [2024-09-18 16:40:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2024-09-18 16:40:29,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 62 [2024-09-18 16:40:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:29,659 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2024-09-18 16:40:29,659 INFO L475 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) [2024-09-18 16:40:29,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2024-09-18 16:40:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 16:40:29,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:29,660 INFO L216 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] [2024-09-18 16:40:29,673 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 16:40:29,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:29,861 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:29,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1582685789, now seen corresponding path program 7 times [2024-09-18 16:40:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721315996] [2024-09-18 16:40:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:29,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:29,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 16:40:30,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721315996] [2024-09-18 16:40:30,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721315996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835632054] [2024-09-18 16:40:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 16:40:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:30,600 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) [2024-09-18 16:40:30,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 16:40:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:30,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-18 16:40:30,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 16:40:31,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:40:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835632054] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:37,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 46 [2024-09-18 16:40:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148888351] [2024-09-18 16:40:37,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:37,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-18 16:40:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-18 16:40:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2024-09-18 16:40:37,331 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) [2024-09-18 16:40:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:39,684 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2024-09-18 16:40:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 16:40:39,684 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 [2024-09-18 16:40:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:39,686 INFO L225 Difference]: With dead ends: 154 [2024-09-18 16:40:39,686 INFO L226 Difference]: Without dead ends: 150 [2024-09-18 16:40:39,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=386, Invalid=3036, Unknown=0, NotChecked=0, Total=3422 [2024-09-18 16:40:39,687 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:39,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 869 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-18 16:40:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-18 16:40:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2024-09-18 16:40:39,712 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) [2024-09-18 16:40:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-18 16:40:39,714 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 62 [2024-09-18 16:40:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:39,715 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-18 16:40:39,715 INFO L475 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) [2024-09-18 16:40:39,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-18 16:40:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 16:40:39,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:39,717 INFO L216 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] [2024-09-18 16:40:39,730 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:39,917 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-18 16:40:39,918 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:39,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1743105565, now seen corresponding path program 8 times [2024-09-18 16:40:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:39,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374889453] [2024-09-18 16:40:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:39,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:39,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:39,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 16:40:40,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374889453] [2024-09-18 16:40:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374889453] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003696790] [2024-09-18 16:40:40,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:40:40,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:40,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:40,688 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) [2024-09-18 16:40:40,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 16:40:40,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:40:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:40,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-18 16:40:40,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:40:41,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:40:46,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003696790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:46,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:46,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 50 [2024-09-18 16:40:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343424263] [2024-09-18 16:40:46,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:46,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-18 16:40:46,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-18 16:40:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 16:40:46,126 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) [2024-09-18 16:40:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:48,512 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2024-09-18 16:40:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 16:40:48,513 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 [2024-09-18 16:40:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:48,514 INFO L225 Difference]: With dead ends: 148 [2024-09-18 16:40:48,514 INFO L226 Difference]: Without dead ends: 144 [2024-09-18 16:40:48,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2024-09-18 16:40:48,516 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:48,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 811 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-18 16:40:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-18 16:40:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 91. [2024-09-18 16:40:48,545 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) [2024-09-18 16:40:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-18 16:40:48,546 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 62 [2024-09-18 16:40:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:48,546 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-18 16:40:48,546 INFO L475 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) [2024-09-18 16:40:48,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-18 16:40:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 16:40:48,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:48,547 INFO L216 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] [2024-09-18 16:40:48,561 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:48,747 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:48,748 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:48,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash -913631875, now seen corresponding path program 9 times [2024-09-18 16:40:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:48,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669593697] [2024-09-18 16:40:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:48,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:48,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:48,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:48,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:49,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:49,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:49,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:49,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 16:40:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669593697] [2024-09-18 16:40:49,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669593697] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222697522] [2024-09-18 16:40:49,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:40:49,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:49,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:40:49,355 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 16:40:49,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 16:40:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:49,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 16:40:49,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-18 16:40:49,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-18 16:40:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222697522] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:53,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:53,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 30 [2024-09-18 16:40:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623847868] [2024-09-18 16:40:53,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:53,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 16:40:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 16:40:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2024-09-18 16:40:53,133 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:40:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:54,018 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2024-09-18 16:40:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:40:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) Word has length 62 [2024-09-18 16:40:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:54,020 INFO L225 Difference]: With dead ends: 127 [2024-09-18 16:40:54,020 INFO L226 Difference]: Without dead ends: 123 [2024-09-18 16:40:54,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 16:40:54,021 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:54,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 16:40:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-18 16:40:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2024-09-18 16:40:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.088235294117647) internal successors, (74), 66 states have internal predecessors, (74), 12 states have call successors, (12), 6 states have call predecessors, (12), 20 states have return successors, (45), 28 states have call predecessors, (45), 11 states have call successors, (45) [2024-09-18 16:40:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2024-09-18 16:40:54,049 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 62 [2024-09-18 16:40:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:54,049 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2024-09-18 16:40:54,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (17), 1 states have call predecessors, (17), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:40:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2024-09-18 16:40:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 16:40:54,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:54,050 INFO L216 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] [2024-09-18 16:40:54,062 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-18 16:40:54,250 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:54,251 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:54,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:54,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1047042077, now seen corresponding path program 10 times [2024-09-18 16:40:54,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:54,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78768961] [2024-09-18 16:40:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:54,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:40:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:40:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-18 16:40:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:40:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78768961] [2024-09-18 16:40:54,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78768961] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:40:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677764291] [2024-09-18 16:40:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:40:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:40:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:40:54,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:40:54,801 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 16:40:54,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:40:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:40:54,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 16:40:54,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:40:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-18 16:40:55,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:40:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-18 16:40:58,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677764291] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:40:58,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:40:58,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2024-09-18 16:40:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866052094] [2024-09-18 16:40:58,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:40:58,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-18 16:40:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:40:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-18 16:40:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-09-18 16:40:58,384 INFO L87 Difference]: Start difference. First operand 101 states and 131 transitions. Second operand has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:40:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:40:59,265 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2024-09-18 16:40:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:40:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) Word has length 62 [2024-09-18 16:40:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:40:59,266 INFO L225 Difference]: With dead ends: 132 [2024-09-18 16:40:59,266 INFO L226 Difference]: Without dead ends: 128 [2024-09-18 16:40:59,267 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 16:40:59,267 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 16:40:59,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 453 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 16:40:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-18 16:40:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2024-09-18 16:40:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.082191780821918) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 6 states have call predecessors, (12), 22 states have return successors, (51), 31 states have call predecessors, (51), 11 states have call successors, (51) [2024-09-18 16:40:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2024-09-18 16:40:59,307 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 62 [2024-09-18 16:40:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:40:59,307 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2024-09-18 16:40:59,307 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:40:59,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2024-09-18 16:40:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:40:59,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:40:59,308 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 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] [2024-09-18 16:40:59,320 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 16:40:59,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 16:40:59,509 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:40:59,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:40:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 330869257, now seen corresponding path program 11 times [2024-09-18 16:40:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:40:59,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4007161] [2024-09-18 16:40:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:40:59,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:40:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:40:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:40:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:40:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:40:59,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:40:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:00,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:00,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-18 16:41:00,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4007161] [2024-09-18 16:41:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4007161] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122890499] [2024-09-18 16:41:00,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 16:41:00,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:00,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:00,150 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 16:41:00,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-18 16:41:00,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:41:00,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 16:41:00,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-18 16:41:00,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:41:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:41:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122890499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:41:05,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:41:05,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2024-09-18 16:41:05,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134639076] [2024-09-18 16:41:05,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:41:05,182 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-18 16:41:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:41:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-18 16:41:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 16:41:05,183 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-18 16:41:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:41:06,355 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2024-09-18 16:41:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 16:41:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) Word has length 70 [2024-09-18 16:41:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:41:06,357 INFO L225 Difference]: With dead ends: 162 [2024-09-18 16:41:06,357 INFO L226 Difference]: Without dead ends: 158 [2024-09-18 16:41:06,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 128 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 16:41:06,358 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:41:06,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 561 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:41:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-18 16:41:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 106. [2024-09-18 16:41:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 6 states have call predecessors, (12), 21 states have return successors, (49), 31 states have call predecessors, (49), 11 states have call successors, (49) [2024-09-18 16:41:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2024-09-18 16:41:06,398 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 70 [2024-09-18 16:41:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:41:06,399 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2024-09-18 16:41:06,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-18 16:41:06,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2024-09-18 16:41:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:41:06,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:41:06,401 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 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] [2024-09-18 16:41:06,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-18 16:41:06,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 16:41:06,601 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:41:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash -786652311, now seen corresponding path program 12 times [2024-09-18 16:41:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:41:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401190841] [2024-09-18 16:41:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:41:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:41:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:06,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:41:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:06,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:41:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:06,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:06,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:06,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:07,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:07,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:41:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:07,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:07,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-18 16:41:07,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:07,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401190841] [2024-09-18 16:41:07,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401190841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:07,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364402557] [2024-09-18 16:41:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 16:41:07,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:07,398 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:07,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 16:41:07,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 16:41:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:41:07,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 16:41:07,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 16:41:08,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:41:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 16:41:15,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364402557] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:41:15,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:41:15,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 26] total 53 [2024-09-18 16:41:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778748248] [2024-09-18 16:41:15,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:41:15,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-18 16:41:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:41:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-18 16:41:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2540, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 16:41:15,096 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 53 states, 47 states have (on average 2.127659574468085) internal successors, (100), 40 states have internal predecessors, (100), 19 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (25), 17 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-18 16:41:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:41:17,130 INFO L93 Difference]: Finished difference Result 165 states and 221 transitions. [2024-09-18 16:41:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:41:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 2.127659574468085) internal successors, (100), 40 states have internal predecessors, (100), 19 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (25), 17 states have call predecessors, (25), 19 states have call successors, (25) Word has length 70 [2024-09-18 16:41:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:41:17,132 INFO L225 Difference]: With dead ends: 165 [2024-09-18 16:41:17,132 INFO L226 Difference]: Without dead ends: 161 [2024-09-18 16:41:17,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=423, Invalid=3609, Unknown=0, NotChecked=0, Total=4032 [2024-09-18 16:41:17,133 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:41:17,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 748 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-18 16:41:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-18 16:41:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2024-09-18 16:41:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 70 states have internal predecessors, (80), 12 states have call successors, (12), 6 states have call predecessors, (12), 22 states have return successors, (52), 32 states have call predecessors, (52), 11 states have call successors, (52) [2024-09-18 16:41:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2024-09-18 16:41:17,173 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 70 [2024-09-18 16:41:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:41:17,173 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2024-09-18 16:41:17,173 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 2.127659574468085) internal successors, (100), 40 states have internal predecessors, (100), 19 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (25), 17 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-18 16:41:17,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2024-09-18 16:41:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:41:17,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:41:17,174 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 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] [2024-09-18 16:41:17,187 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-18 16:41:17,374 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-18 16:41:17,374 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:41:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2019705943, now seen corresponding path program 13 times [2024-09-18 16:41:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:41:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528601457] [2024-09-18 16:41:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:41:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:41:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:41:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:41:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:17,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:41:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:18,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:18,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-18 16:41:18,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:18,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528601457] [2024-09-18 16:41:18,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528601457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:18,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619585030] [2024-09-18 16:41:18,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 16:41:18,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:18,188 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:18,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 16:41:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:18,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 16:41:18,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-18 16:41:19,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:41:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 16:41:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619585030] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:41:24,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:41:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 25] total 44 [2024-09-18 16:41:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312934707] [2024-09-18 16:41:24,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:41:24,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-18 16:41:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:41:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-18 16:41:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 16:41:24,694 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2024-09-18 16:41:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:41:27,021 INFO L93 Difference]: Finished difference Result 159 states and 211 transitions. [2024-09-18 16:41:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 16:41:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 70 [2024-09-18 16:41:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:41:27,023 INFO L225 Difference]: With dead ends: 159 [2024-09-18 16:41:27,023 INFO L226 Difference]: Without dead ends: 155 [2024-09-18 16:41:27,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=449, Invalid=3211, Unknown=0, NotChecked=0, Total=3660 [2024-09-18 16:41:27,024 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 65 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:41:27,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 775 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-18 16:41:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-18 16:41:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2024-09-18 16:41:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 64 states have internal predecessors, (72), 12 states have call successors, (12), 6 states have call predecessors, (12), 19 states have return successors, (43), 27 states have call predecessors, (43), 11 states have call successors, (43) [2024-09-18 16:41:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2024-09-18 16:41:27,056 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 70 [2024-09-18 16:41:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:41:27,057 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2024-09-18 16:41:27,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2024-09-18 16:41:27,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2024-09-18 16:41:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:41:27,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:41:27,058 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 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] [2024-09-18 16:41:27,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-18 16:41:27,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-18 16:41:27,259 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:41:27,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1157739785, now seen corresponding path program 14 times [2024-09-18 16:41:27,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:41:27,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736559254] [2024-09-18 16:41:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:41:27,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:41:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:41:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:41:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:41:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-18 16:41:27,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736559254] [2024-09-18 16:41:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736559254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077442215] [2024-09-18 16:41:27,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:41:27,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:27,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:27,967 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:27,968 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 16:41:28,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:41:28,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:41:28,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 16:41:28,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:41:28,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:41:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 16:41:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077442215] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:41:33,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:41:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 25] total 40 [2024-09-18 16:41:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858888626] [2024-09-18 16:41:33,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:41:33,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-18 16:41:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:41:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-18 16:41:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 16:41:33,874 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-18 16:41:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:41:35,667 INFO L93 Difference]: Finished difference Result 159 states and 213 transitions. [2024-09-18 16:41:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:41:35,668 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 70 [2024-09-18 16:41:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:41:35,669 INFO L225 Difference]: With dead ends: 159 [2024-09-18 16:41:35,669 INFO L226 Difference]: Without dead ends: 155 [2024-09-18 16:41:35,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 16:41:35,674 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:41:35,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 676 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 16:41:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-18 16:41:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 88. [2024-09-18 16:41:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 12 states have call successors, (12), 6 states have call predecessors, (12), 16 states have return successors, (34), 23 states have call predecessors, (34), 11 states have call successors, (34) [2024-09-18 16:41:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2024-09-18 16:41:35,706 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 70 [2024-09-18 16:41:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:41:35,707 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2024-09-18 16:41:35,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-18 16:41:35,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2024-09-18 16:41:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-18 16:41:35,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:41:35,708 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 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] [2024-09-18 16:41:35,721 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-18 16:41:35,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-18 16:41:35,909 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:41:35,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash -434407587, now seen corresponding path program 15 times [2024-09-18 16:41:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:41:35,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048123250] [2024-09-18 16:41:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:41:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:41:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:41:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:41:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-18 16:41:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:36,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:37,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 16:41:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048123250] [2024-09-18 16:41:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048123250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023757098] [2024-09-18 16:41:37,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:41:37,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:37,130 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:37,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 16:41:37,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 16:41:37,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:41:37,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-18 16:41:37,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 16:41:39,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:41:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:41:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023757098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:41:49,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:41:49,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 28] total 66 [2024-09-18 16:41:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771066722] [2024-09-18 16:41:49,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:41:49,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-18 16:41:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:41:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-18 16:41:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4034, Unknown=0, NotChecked=0, Total=4290 [2024-09-18 16:41:49,757 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand has 66 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 48 states have internal predecessors, (120), 20 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2024-09-18 16:41:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:41:55,337 INFO L93 Difference]: Finished difference Result 190 states and 250 transitions. [2024-09-18 16:41:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 16:41:55,338 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 48 states have internal predecessors, (120), 20 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) Word has length 78 [2024-09-18 16:41:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:41:55,339 INFO L225 Difference]: With dead ends: 190 [2024-09-18 16:41:55,339 INFO L226 Difference]: Without dead ends: 186 [2024-09-18 16:41:55,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=965, Invalid=8347, Unknown=0, NotChecked=0, Total=9312 [2024-09-18 16:41:55,340 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:41:55,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1155 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-18 16:41:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-18 16:41:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 66. [2024-09-18 16:41:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (17), 14 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-18 16:41:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2024-09-18 16:41:55,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 78 [2024-09-18 16:41:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:41:55,362 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2024-09-18 16:41:55,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 48 states have internal predecessors, (120), 20 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2024-09-18 16:41:55,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2024-09-18 16:41:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-18 16:41:55,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:41:55,364 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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] [2024-09-18 16:41:55,376 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-18 16:41:55,565 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:55,566 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:41:55,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:41:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash -878294995, now seen corresponding path program 16 times [2024-09-18 16:41:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:41:55,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600771391] [2024-09-18 16:41:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:41:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:41:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:41:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:41:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-18 16:41:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 16:41:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:55,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:56,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:41:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:41:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:41:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:41:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600771391] [2024-09-18 16:41:56,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600771391] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:41:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826477886] [2024-09-18 16:41:56,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:41:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:41:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:41:56,173 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:41:56,174 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 16:41:56,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:41:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:41:56,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 16:41:56,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:41:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:41:57,034 INFO L327 TraceCheckSpWp]: Computing backward predicates...