./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/gcd02.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:24:25,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:24:25,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:24:25,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:24:25,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:24:25,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:24:25,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:24:25,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:24:25,391 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:24:25,392 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:24:25,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:24:25,396 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:24:25,396 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:24:25,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:24:25,397 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:24:25,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:24:25,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:24:25,398 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:24:25,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:24:25,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:24:25,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:24:25,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:24:25,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:24:25,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:24:25,403 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:24:25,403 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:24:25,403 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:24:25,404 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:24:25,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:24:25,404 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:24:25,404 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:24:25,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:24:25,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:24:25,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:24:25,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:24:25,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:24:25,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:24:25,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:24:25,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:24:25,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:24:25,408 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:24:25,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:24:25,409 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 11:24:25,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:24:25,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:24:25,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:24:25,748 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:24:25,748 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:24:25,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/gcd02.c [2024-09-25 11:24:27,262 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:24:27,463 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:24:27,465 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/gcd02.c [2024-09-25 11:24:27,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9ce47b45b/b1feba148c2c45699de27c7d6ea7dc55/FLAG03865207a [2024-09-25 11:24:27,845 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9ce47b45b/b1feba148c2c45699de27c7d6ea7dc55 [2024-09-25 11:24:27,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:24:27,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:24:27,849 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:24:27,849 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:24:27,856 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:24:27,857 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:24:27" (1/1) ... [2024-09-25 11:24:27,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cc8447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:27, skipping insertion in model container [2024-09-25 11:24:27,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:24:27" (1/1) ... [2024-09-25 11:24:27,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:24:28,040 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] [2024-09-25 11:24:28,057 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] [2024-09-25 11:24:28,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:24:28,074 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:24:28,088 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] [2024-09-25 11:24:28,095 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] [2024-09-25 11:24:28,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:24:28,116 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:24:28,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28 WrapperNode [2024-09-25 11:24:28,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:24:28,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:24:28,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:24:28,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:24:28,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,139 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:24:28,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:24:28,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:24:28,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:24:28,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:24:28,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,152 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,164 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]. [2024-09-25 11:24:28,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:24:28,172 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:24:28,176 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:24:28,176 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:24:28,177 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (1/1) ... [2024-09-25 11:24:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:24:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:28,208 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) [2024-09-25 11:24:28,211 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 [2024-09-25 11:24:28,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:24:28,254 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2024-09-25 11:24:28,255 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2024-09-25 11:24:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:24:28,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:24:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:24:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:24:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:24:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:24:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2024-09-25 11:24:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2024-09-25 11:24:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:24:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:24:28,314 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:24:28,316 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:24:28,529 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 11:24:28,529 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:24:28,561 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:24:28,574 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 11:24:28,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:24:28 BoogieIcfgContainer [2024-09-25 11:24:28,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:24:28,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:24:28,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:24:28,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:24:28,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:24:27" (1/3) ... [2024-09-25 11:24:28,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adb9f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:24:28, skipping insertion in model container [2024-09-25 11:24:28,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:28" (2/3) ... [2024-09-25 11:24:28,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adb9f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:24:28, skipping insertion in model container [2024-09-25 11:24:28,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:24:28" (3/3) ... [2024-09-25 11:24:28,585 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2024-09-25 11:24:28,601 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:24:28,602 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-25 11:24:28,660 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:24:28,667 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;@39c0f598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:24:28,668 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-25 11:24:28,672 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) [2024-09-25 11:24:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-25 11:24:28,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:28,679 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:24:28,679 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:28,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1001653490, now seen corresponding path program 1 times [2024-09-25 11:24:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340795439] [2024-09-25 11:24:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:24:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340795439] [2024-09-25 11:24:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340795439] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:29,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:24:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920830597] [2024-09-25 11:24:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:29,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:24:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:24:29,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:24:29,079 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) [2024-09-25 11:24:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:29,207 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2024-09-25 11:24:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:24:29,214 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 [2024-09-25 11:24:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:29,222 INFO L225 Difference]: With dead ends: 85 [2024-09-25 11:24:29,223 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 11:24:29,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:24:29,231 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:29,232 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] [2024-09-25 11:24:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 11:24:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-09-25 11:24:29,280 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) [2024-09-25 11:24:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-25 11:24:29,284 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-25 11:24:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:29,285 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-25 11:24:29,286 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) [2024-09-25 11:24:29,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-25 11:24:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:24:29,288 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:29,288 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:24:29,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:24:29,288 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2101058803, now seen corresponding path program 1 times [2024-09-25 11:24:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621980154] [2024-09-25 11:24:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:29,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:24:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621980154] [2024-09-25 11:24:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621980154] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 11:24:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461542952] [2024-09-25 11:24:29,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:29,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 11:24:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 11:24:29,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:24:29,577 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) [2024-09-25 11:24:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:29,733 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2024-09-25 11:24:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 11:24:29,734 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 [2024-09-25 11:24:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:29,736 INFO L225 Difference]: With dead ends: 68 [2024-09-25 11:24:29,737 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 11:24:29,738 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 [2024-09-25 11:24:29,740 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:29,740 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] [2024-09-25 11:24:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 11:24:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-09-25 11:24:29,765 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) [2024-09-25 11:24:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-25 11:24:29,766 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 17 [2024-09-25 11:24:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:29,767 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-25 11:24:29,767 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) [2024-09-25 11:24:29,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-25 11:24:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:24:29,768 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:29,769 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:24:29,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 11:24:29,769 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:29,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2098228658, now seen corresponding path program 1 times [2024-09-25 11:24:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:29,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775180636] [2024-09-25 11:24:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:24:29,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775180636] [2024-09-25 11:24:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775180636] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:29,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:29,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:24:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834288224] [2024-09-25 11:24:29,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:29,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:24:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:24:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:24:29,894 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) [2024-09-25 11:24:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:30,002 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2024-09-25 11:24:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:24:30,002 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 [2024-09-25 11:24:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:30,004 INFO L225 Difference]: With dead ends: 66 [2024-09-25 11:24:30,004 INFO L226 Difference]: Without dead ends: 64 [2024-09-25 11:24:30,005 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 [2024-09-25 11:24:30,006 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 [2024-09-25 11:24:30,006 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] [2024-09-25 11:24:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-25 11:24:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-09-25 11:24:30,028 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) [2024-09-25 11:24:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-09-25 11:24:30,030 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 17 [2024-09-25 11:24:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:30,030 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-09-25 11:24:30,030 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) [2024-09-25 11:24:30,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-09-25 11:24:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-25 11:24:30,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:30,032 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] [2024-09-25 11:24:30,032 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 11:24:30,033 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:30,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1634934741, now seen corresponding path program 1 times [2024-09-25 11:24:30,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:30,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590570171] [2024-09-25 11:24:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:30,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 11:24:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:24:30,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:30,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590570171] [2024-09-25 11:24:30,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590570171] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:30,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:30,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-25 11:24:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294911974] [2024-09-25 11:24:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:30,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 11:24:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 11:24:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 11:24:30,092 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) [2024-09-25 11:24:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:30,117 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-09-25 11:24:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 11:24:30,117 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 [2024-09-25 11:24:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:30,121 INFO L225 Difference]: With dead ends: 58 [2024-09-25 11:24:30,121 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 11:24:30,122 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 [2024-09-25 11:24:30,122 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 [2024-09-25 11:24:30,123 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] [2024-09-25 11:24:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 11:24:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 11:24:30,139 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) [2024-09-25 11:24:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-25 11:24:30,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 23 [2024-09-25 11:24:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:30,141 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-25 11:24:30,141 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) [2024-09-25 11:24:30,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-25 11:24:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:24:30,144 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:30,144 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] [2024-09-25 11:24:30,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-25 11:24:30,144 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:30,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -146564981, now seen corresponding path program 1 times [2024-09-25 11:24:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:30,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509257245] [2024-09-25 11:24:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 11:24:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:24:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509257245] [2024-09-25 11:24:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509257245] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:30,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:24:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153636609] [2024-09-25 11:24:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:30,345 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:24:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:24:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:24:30,346 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) [2024-09-25 11:24:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:30,504 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-25 11:24:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:24:30,505 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 [2024-09-25 11:24:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:30,507 INFO L225 Difference]: With dead ends: 72 [2024-09-25 11:24:30,507 INFO L226 Difference]: Without dead ends: 68 [2024-09-25 11:24:30,508 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 [2024-09-25 11:24:30,508 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 [2024-09-25 11:24:30,509 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] [2024-09-25 11:24:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-25 11:24:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-09-25 11:24:30,543 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) [2024-09-25 11:24:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2024-09-25 11:24:30,547 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 24 [2024-09-25 11:24:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:30,547 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2024-09-25 11:24:30,547 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) [2024-09-25 11:24:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2024-09-25 11:24:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 11:24:30,551 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:30,551 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] [2024-09-25 11:24:30,551 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-25 11:24:30,551 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:30,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -698589569, now seen corresponding path program 1 times [2024-09-25 11:24:30,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:30,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735648752] [2024-09-25 11:24:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:30,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 11:24:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:24:30,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:30,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735648752] [2024-09-25 11:24:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735648752] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:30,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:30,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:24:30,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915849876] [2024-09-25 11:24:30,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:30,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:24:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:24:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:24:30,677 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) [2024-09-25 11:24:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:30,710 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-09-25 11:24:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:24:30,710 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 [2024-09-25 11:24:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:30,712 INFO L225 Difference]: With dead ends: 67 [2024-09-25 11:24:30,712 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 11:24:30,712 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 [2024-09-25 11:24:30,713 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 [2024-09-25 11:24:30,713 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] [2024-09-25 11:24:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 11:24:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-25 11:24:30,734 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) [2024-09-25 11:24:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-09-25 11:24:30,737 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 30 [2024-09-25 11:24:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:30,737 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-09-25 11:24:30,737 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) [2024-09-25 11:24:30,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-09-25 11:24:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 11:24:30,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:30,743 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] [2024-09-25 11:24:30,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-25 11:24:30,743 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:30,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1845010923, now seen corresponding path program 1 times [2024-09-25 11:24:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:30,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309666185] [2024-09-25 11:24:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 11:24:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:24:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309666185] [2024-09-25 11:24:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309666185] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120052698] [2024-09-25 11:24:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:30,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:30,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:30,961 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) [2024-09-25 11:24:30,963 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:24:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 11:24:31,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:24:31,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:24:31,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120052698] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:31,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2024-09-25 11:24:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035797743] [2024-09-25 11:24:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:31,276 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 11:24:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 11:24:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-25 11:24:31,277 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) [2024-09-25 11:24:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:31,441 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-09-25 11:24:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:24:31,442 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 [2024-09-25 11:24:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:31,443 INFO L225 Difference]: With dead ends: 66 [2024-09-25 11:24:31,443 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 11:24:31,444 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 [2024-09-25 11:24:31,447 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 [2024-09-25 11:24:31,447 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] [2024-09-25 11:24:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 11:24:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-25 11:24:31,469 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) [2024-09-25 11:24:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-25 11:24:31,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 31 [2024-09-25 11:24:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:31,471 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-25 11:24:31,471 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) [2024-09-25 11:24:31,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-25 11:24:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 11:24:31,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:31,473 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] [2024-09-25 11:24:31,493 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 11:24:31,673 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 [2024-09-25 11:24:31,674 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:31,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2081598593, now seen corresponding path program 1 times [2024-09-25 11:24:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:31,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967710889] [2024-09-25 11:24:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:31,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:24:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:24:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967710889] [2024-09-25 11:24:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967710889] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:24:31,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:24:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-25 11:24:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949713576] [2024-09-25 11:24:31,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:24:31,827 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 11:24:31,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 11:24:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-25 11:24:31,828 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) [2024-09-25 11:24:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:32,008 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2024-09-25 11:24:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:24:32,009 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 [2024-09-25 11:24:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:32,010 INFO L225 Difference]: With dead ends: 77 [2024-09-25 11:24:32,010 INFO L226 Difference]: Without dead ends: 73 [2024-09-25 11:24:32,011 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:24:32,011 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 [2024-09-25 11:24:32,012 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] [2024-09-25 11:24:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-25 11:24:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2024-09-25 11:24:32,038 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) [2024-09-25 11:24:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-25 11:24:32,039 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 32 [2024-09-25 11:24:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:32,039 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-25 11:24:32,040 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) [2024-09-25 11:24:32,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-25 11:24:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 11:24:32,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:32,045 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] [2024-09-25 11:24:32,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-25 11:24:32,045 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:32,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1569823201, now seen corresponding path program 1 times [2024-09-25 11:24:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009315351] [2024-09-25 11:24:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:24:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:24:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009315351] [2024-09-25 11:24:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009315351] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705843655] [2024-09-25 11:24:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:32,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:32,232 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) [2024-09-25 11:24:32,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:24:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:32,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-25 11:24:32,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:24:32,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 11:24:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705843655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:32,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:32,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-25 11:24:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200782258] [2024-09-25 11:24:32,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:32,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:24:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:24:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:24:32,749 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) [2024-09-25 11:24:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:32,989 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2024-09-25 11:24:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 11:24:32,990 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 [2024-09-25 11:24:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:32,991 INFO L225 Difference]: With dead ends: 85 [2024-09-25 11:24:32,991 INFO L226 Difference]: Without dead ends: 81 [2024-09-25 11:24:32,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:24:32,992 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:32,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 256 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:24:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-25 11:24:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2024-09-25 11:24:33,018 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) [2024-09-25 11:24:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-09-25 11:24:33,019 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2024-09-25 11:24:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:33,020 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-09-25 11:24:33,020 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) [2024-09-25 11:24:33,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-09-25 11:24:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-25 11:24:33,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:33,022 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] [2024-09-25 11:24:33,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 11:24:33,226 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 [2024-09-25 11:24:33,227 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:33,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1637323657, now seen corresponding path program 1 times [2024-09-25 11:24:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570189288] [2024-09-25 11:24:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:24:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:24:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570189288] [2024-09-25 11:24:33,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570189288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783534943] [2024-09-25 11:24:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:33,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:33,449 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) [2024-09-25 11:24:33,451 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:24:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:33,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 11:24:33,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:24:33,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:24:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783534943] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:33,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2024-09-25 11:24:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440694841] [2024-09-25 11:24:33,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:33,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:24:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:24:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:24:33,722 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) [2024-09-25 11:24:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:33,909 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2024-09-25 11:24:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:24:33,910 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 [2024-09-25 11:24:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:33,911 INFO L225 Difference]: With dead ends: 81 [2024-09-25 11:24:33,911 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 11:24:33,911 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 [2024-09-25 11:24:33,912 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 [2024-09-25 11:24:33,912 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] [2024-09-25 11:24:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 11:24:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2024-09-25 11:24:33,935 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) [2024-09-25 11:24:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2024-09-25 11:24:33,936 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 39 [2024-09-25 11:24:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:33,937 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2024-09-25 11:24:33,937 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) [2024-09-25 11:24:33,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2024-09-25 11:24:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-25 11:24:33,938 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:33,938 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] [2024-09-25 11:24:33,955 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 11:24:34,139 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 [2024-09-25 11:24:34,139 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:34,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 514532823, now seen corresponding path program 1 times [2024-09-25 11:24:34,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635761588] [2024-09-25 11:24:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:24:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:24:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635761588] [2024-09-25 11:24:34,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635761588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647107369] [2024-09-25 11:24:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:34,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:34,385 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) [2024-09-25 11:24:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:24:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:34,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 11:24:34,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:24:34,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:24:35,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647107369] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:35,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2024-09-25 11:24:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911910467] [2024-09-25 11:24:35,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:35,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:24:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:35,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:24:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:24:35,179 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) [2024-09-25 11:24:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:35,451 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-09-25 11:24:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 11:24:35,452 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 [2024-09-25 11:24:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:35,453 INFO L225 Difference]: With dead ends: 91 [2024-09-25 11:24:35,453 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 11:24:35,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-25 11:24:35,454 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:35,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:24:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 11:24:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2024-09-25 11:24:35,478 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) [2024-09-25 11:24:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-09-25 11:24:35,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 39 [2024-09-25 11:24:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:35,479 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-09-25 11:24:35,479 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) [2024-09-25 11:24:35,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-09-25 11:24:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 11:24:35,484 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:35,485 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] [2024-09-25 11:24:35,502 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 11:24:35,685 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 [2024-09-25 11:24:35,685 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:35,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 813588075, now seen corresponding path program 1 times [2024-09-25 11:24:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884376040] [2024-09-25 11:24:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:24:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:24:35,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884376040] [2024-09-25 11:24:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884376040] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208382796] [2024-09-25 11:24:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:35,939 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) [2024-09-25 11:24:35,940 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:24:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:35,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 11:24:35,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:24:36,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:24:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208382796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:36,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 22 [2024-09-25 11:24:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399783356] [2024-09-25 11:24:36,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:36,702 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 11:24:36,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 11:24:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-09-25 11:24:36,703 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) [2024-09-25 11:24:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:36,985 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2024-09-25 11:24:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:24:36,986 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 [2024-09-25 11:24:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:36,988 INFO L225 Difference]: With dead ends: 84 [2024-09-25 11:24:36,988 INFO L226 Difference]: Without dead ends: 80 [2024-09-25 11:24:36,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-09-25 11:24:36,990 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:36,990 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] [2024-09-25 11:24:36,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-25 11:24:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2024-09-25 11:24:37,011 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) [2024-09-25 11:24:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-09-25 11:24:37,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 40 [2024-09-25 11:24:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:37,013 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-09-25 11:24:37,014 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) [2024-09-25 11:24:37,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-09-25 11:24:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:24:37,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:37,015 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] [2024-09-25 11:24:37,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 11:24:37,215 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 [2024-09-25 11:24:37,215 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:37,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1812824075, now seen corresponding path program 1 times [2024-09-25 11:24:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365204893] [2024-09-25 11:24:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:24:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:24:37,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:37,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365204893] [2024-09-25 11:24:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365204893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:37,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147632640] [2024-09-25 11:24:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:37,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:37,515 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) [2024-09-25 11:24:37,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:24:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:37,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 11:24:37,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-25 11:24:37,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:24:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:24:38,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147632640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:24:38,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:24:38,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 22 [2024-09-25 11:24:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510207090] [2024-09-25 11:24:38,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:24:38,464 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 11:24:38,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:24:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 11:24:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-25 11:24:38,465 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) [2024-09-25 11:24:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:24:38,751 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2024-09-25 11:24:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:24:38,752 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 [2024-09-25 11:24:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:24:38,753 INFO L225 Difference]: With dead ends: 90 [2024-09-25 11:24:38,753 INFO L226 Difference]: Without dead ends: 86 [2024-09-25 11:24:38,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:24:38,755 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:24:38,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 256 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:24:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-25 11:24:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2024-09-25 11:24:38,773 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) [2024-09-25 11:24:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2024-09-25 11:24:38,774 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 47 [2024-09-25 11:24:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:24:38,774 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2024-09-25 11:24:38,774 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) [2024-09-25 11:24:38,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2024-09-25 11:24:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:24:38,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:24:38,776 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] [2024-09-25 11:24:38,791 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:24:38,980 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 [2024-09-25 11:24:38,981 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:24:38,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:24:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash -740789303, now seen corresponding path program 2 times [2024-09-25 11:24:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:24:38,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813100743] [2024-09-25 11:24:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:24:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:24:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:24:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:24:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:24:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:24:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:24:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:24:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:24:39,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:24:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813100743] [2024-09-25 11:24:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813100743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:24:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849069825] [2024-09-25 11:24:39,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:24:39,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:24:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:24:39,361 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) [2024-09-25 11:24:39,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:24:39,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:24:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:24:39,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 11:24:39,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:24:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:24:39,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:26:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849069825] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:26:45,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:26:45,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2024-09-25 11:26:45,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186304127] [2024-09-25 11:26:45,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:26:45,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:26:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:26:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:26:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=647, Unknown=28, NotChecked=0, Total=756 [2024-09-25 11:26:45,139 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) [2024-09-25 11:26:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:26:47,451 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-09-25 11:26:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:26:47,451 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 [2024-09-25 11:26:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:26:47,452 INFO L225 Difference]: With dead ends: 102 [2024-09-25 11:26:47,452 INFO L226 Difference]: Without dead ends: 98 [2024-09-25 11:26:47,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 124.7s TimeCoverageRelationStatistics Valid=137, Invalid=957, Unknown=28, NotChecked=0, Total=1122 [2024-09-25 11:26:47,454 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:26:47,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 447 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-25 11:26:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-25 11:26:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-09-25 11:26:47,473 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) [2024-09-25 11:26:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2024-09-25 11:26:47,474 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 54 [2024-09-25 11:26:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:26:47,474 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2024-09-25 11:26:47,475 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) [2024-09-25 11:26:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:26:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2024-09-25 11:26:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:26:47,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:26:47,476 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] [2024-09-25 11:26:47,494 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 11:26:47,680 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 [2024-09-25 11:26:47,681 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:26:47,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:26:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1112627139, now seen corresponding path program 2 times [2024-09-25 11:26:47,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:26:47,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031953119] [2024-09-25 11:26:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:26:47,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:26:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:47,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:26:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:47,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:26:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:48,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:26:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:48,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:26:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:48,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:26:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:48,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:26:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:26:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:26:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031953119] [2024-09-25 11:26:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031953119] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:26:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688359846] [2024-09-25 11:26:49,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:26:49,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:26:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:26:49,352 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) [2024-09-25 11:26:49,353 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:26:49,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:26:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:26:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-25 11:26:49,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:26:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 11:26:49,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:26:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:26:51,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688359846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:26:51,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:26:51,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2024-09-25 11:26:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459766863] [2024-09-25 11:26:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:26:51,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 11:26:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:26:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 11:26:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-25 11:26:51,675 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) [2024-09-25 11:26:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:26:52,992 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2024-09-25 11:26:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:26:52,993 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 [2024-09-25 11:26:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:26:52,994 INFO L225 Difference]: With dead ends: 98 [2024-09-25 11:26:52,994 INFO L226 Difference]: Without dead ends: 89 [2024-09-25 11:26:52,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-09-25 11:26:52,995 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:26:52,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 239 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:26:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-25 11:26:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2024-09-25 11:26:53,014 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) [2024-09-25 11:26:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-09-25 11:26:53,017 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 46 [2024-09-25 11:26:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:26:53,018 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-09-25 11:26:53,019 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) [2024-09-25 11:26:53,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:26:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-09-25 11:26:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:26:53,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:26:53,021 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] [2024-09-25 11:26:53,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 11:26:53,221 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 [2024-09-25 11:26:53,222 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:26:53,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:26:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 409599947, now seen corresponding path program 3 times [2024-09-25 11:26:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:26:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550398249] [2024-09-25 11:26:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:26:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:26:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:53,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:26:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:53,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:26:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:53,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:26:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:53,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:26:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:53,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:26:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:54,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:26:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:26:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 11:26:54,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:26:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550398249] [2024-09-25 11:26:54,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550398249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:26:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671250864] [2024-09-25 11:26:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:26:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:26:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:26:54,291 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) [2024-09-25 11:26:54,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:26:54,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 11:26:54,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:26:54,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 11:26:54,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:26:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:26:55,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:26:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:26:59,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671250864] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:26:59,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:26:59,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 34 [2024-09-25 11:26:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853265402] [2024-09-25 11:26:59,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:26:59,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 11:26:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:26:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 11:26:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:26:59,293 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) [2024-09-25 11:27:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:01,723 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2024-09-25 11:27:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:27:01,723 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 [2024-09-25 11:27:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:01,724 INFO L225 Difference]: With dead ends: 132 [2024-09-25 11:27:01,724 INFO L226 Difference]: Without dead ends: 128 [2024-09-25 11:27:01,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 11:27:01,726 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:01,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 485 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-25 11:27:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-25 11:27:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2024-09-25 11:27:01,765 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) [2024-09-25 11:27:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2024-09-25 11:27:01,766 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 47 [2024-09-25 11:27:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:01,766 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2024-09-25 11:27:01,767 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) [2024-09-25 11:27:01,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2024-09-25 11:27:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:27:01,768 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:01,768 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] [2024-09-25 11:27:01,782 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 11:27:01,968 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 [2024-09-25 11:27:01,969 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:01,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash -315864469, now seen corresponding path program 3 times [2024-09-25 11:27:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605483192] [2024-09-25 11:27:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:27:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:02,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 11:27:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605483192] [2024-09-25 11:27:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605483192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904134837] [2024-09-25 11:27:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:27:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:03,055 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) [2024-09-25 11:27:03,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:27:03,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 11:27:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:27:03,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 11:27:03,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:27:04,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:27:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:27:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904134837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:27:08,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:27:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2024-09-25 11:27:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464586179] [2024-09-25 11:27:08,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:27:08,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 11:27:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:27:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 11:27:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 11:27:08,792 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) [2024-09-25 11:27:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:11,037 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2024-09-25 11:27:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:27:11,037 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 [2024-09-25 11:27:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:11,038 INFO L225 Difference]: With dead ends: 115 [2024-09-25 11:27:11,039 INFO L226 Difference]: Without dead ends: 111 [2024-09-25 11:27:11,039 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 11:27:11,040 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:11,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 460 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:27:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-25 11:27:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2024-09-25 11:27:11,058 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) [2024-09-25 11:27:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2024-09-25 11:27:11,059 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 47 [2024-09-25 11:27:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:11,060 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2024-09-25 11:27:11,060 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) [2024-09-25 11:27:11,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2024-09-25 11:27:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 11:27:11,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:11,061 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] [2024-09-25 11:27:11,079 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 11:27:11,262 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 [2024-09-25 11:27:11,262 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:11,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1839407255, now seen corresponding path program 4 times [2024-09-25 11:27:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:11,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423230547] [2024-09-25 11:27:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:11,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:11,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:11,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:11,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:11,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:12,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:27:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:12,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:27:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423230547] [2024-09-25 11:27:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423230547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535518634] [2024-09-25 11:27:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:27:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:12,437 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) [2024-09-25 11:27:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:27:12,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:27:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:27:12,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 11:27:12,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:27:13,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:27:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 11:27:19,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535518634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:27:19,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:27:19,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 36 [2024-09-25 11:27:19,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15839456] [2024-09-25 11:27:19,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:27:19,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 11:27:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:27:19,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 11:27:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 11:27:19,243 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) [2024-09-25 11:27:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:22,391 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2024-09-25 11:27:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 11:27:22,391 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 [2024-09-25 11:27:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:22,393 INFO L225 Difference]: With dead ends: 126 [2024-09-25 11:27:22,393 INFO L226 Difference]: Without dead ends: 122 [2024-09-25 11:27:22,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 11:27:22,394 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:22,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 459 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-25 11:27:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-25 11:27:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2024-09-25 11:27:22,412 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) [2024-09-25 11:27:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-09-25 11:27:22,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 55 [2024-09-25 11:27:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:22,413 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-09-25 11:27:22,414 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) [2024-09-25 11:27:22,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-09-25 11:27:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:27:22,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:22,415 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] [2024-09-25 11:27:22,426 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 11:27:22,615 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 [2024-09-25 11:27:22,615 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:22,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1099967369, now seen corresponding path program 5 times [2024-09-25 11:27:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210000862] [2024-09-25 11:27:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:22,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:22,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:22,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:23,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:23,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:27:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:23,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:23,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:27:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210000862] [2024-09-25 11:27:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210000862] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993431041] [2024-09-25 11:27:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:27:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:24,011 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) [2024-09-25 11:27:24,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:27:24,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-25 11:27:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:27:24,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 11:27:24,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 11:27:25,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:27:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-25 11:27:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993431041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:27:29,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:27:29,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2024-09-25 11:27:29,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919664300] [2024-09-25 11:27:29,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:27:29,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 11:27:29,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:27:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 11:27:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:27:29,677 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) [2024-09-25 11:27:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:31,795 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2024-09-25 11:27:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:27:31,795 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 [2024-09-25 11:27:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:31,796 INFO L225 Difference]: With dead ends: 92 [2024-09-25 11:27:31,796 INFO L226 Difference]: Without dead ends: 83 [2024-09-25 11:27:31,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:27:31,797 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:31,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 399 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:27:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-25 11:27:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-25 11:27:31,822 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) [2024-09-25 11:27:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2024-09-25 11:27:31,823 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 54 [2024-09-25 11:27:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:31,823 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2024-09-25 11:27:31,823 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) [2024-09-25 11:27:31,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2024-09-25 11:27:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:27:31,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:31,824 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] [2024-09-25 11:27:31,840 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 11:27:32,025 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 [2024-09-25 11:27:32,025 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:32,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2071268055, now seen corresponding path program 4 times [2024-09-25 11:27:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:32,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822010010] [2024-09-25 11:27:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:27:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:27:32,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822010010] [2024-09-25 11:27:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822010010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832960752] [2024-09-25 11:27:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:27:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:32,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:32,952 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) [2024-09-25 11:27:32,952 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 11:27:33,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:27:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:27:33,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 11:27:33,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:27:34,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:27:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:27:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832960752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:27:38,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:27:38,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2024-09-25 11:27:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286430198] [2024-09-25 11:27:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:27:38,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:27:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:27:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:27:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-09-25 11:27:38,281 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) [2024-09-25 11:27:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:40,159 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2024-09-25 11:27:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:27:40,159 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 [2024-09-25 11:27:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:40,160 INFO L225 Difference]: With dead ends: 100 [2024-09-25 11:27:40,160 INFO L226 Difference]: Without dead ends: 96 [2024-09-25 11:27:40,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 11:27:40,161 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:40,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 522 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:27:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-25 11:27:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2024-09-25 11:27:40,179 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) [2024-09-25 11:27:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2024-09-25 11:27:40,180 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2024-09-25 11:27:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:40,180 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2024-09-25 11:27:40,181 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) [2024-09-25 11:27:40,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2024-09-25 11:27:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 11:27:40,181 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:40,182 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] [2024-09-25 11:27:40,196 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 11:27:40,382 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 [2024-09-25 11:27:40,382 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:40,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -377988163, now seen corresponding path program 6 times [2024-09-25 11:27:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752390516] [2024-09-25 11:27:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:40,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:40,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:40,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:40,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:40,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:41,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:41,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:27:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:41,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:41,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 11:27:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752390516] [2024-09-25 11:27:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752390516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539002263] [2024-09-25 11:27:41,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 11:27:41,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:41,618 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) [2024-09-25 11:27:41,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 11:27:41,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-25 11:27:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:27:41,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 11:27:41,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:27:43,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:27:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:27:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539002263] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:27:49,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:27:49,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 42 [2024-09-25 11:27:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075084648] [2024-09-25 11:27:49,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:27:49,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 11:27:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:27:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 11:27:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 11:27:49,972 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) [2024-09-25 11:27:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:27:53,994 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2024-09-25 11:27:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 11:27:53,995 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 [2024-09-25 11:27:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:27:53,997 INFO L225 Difference]: With dead ends: 139 [2024-09-25 11:27:53,997 INFO L226 Difference]: Without dead ends: 135 [2024-09-25 11:27:53,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 11:27:53,998 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:27:53,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 734 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-25 11:27:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-25 11:27:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2024-09-25 11:27:54,038 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) [2024-09-25 11:27:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2024-09-25 11:27:54,039 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 62 [2024-09-25 11:27:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:27:54,039 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2024-09-25 11:27:54,039 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) [2024-09-25 11:27:54,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2024-09-25 11:27:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 11:27:54,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:27:54,040 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] [2024-09-25 11:27:54,055 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 11:27:54,241 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 [2024-09-25 11:27:54,241 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:27:54,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:27:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1582685789, now seen corresponding path program 7 times [2024-09-25 11:27:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:27:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844124609] [2024-09-25 11:27:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:27:54,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:27:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:54,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:27:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:54,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:27:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:54,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:54,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:54,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:27:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:55,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:27:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:55,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:55,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:27:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:27:55,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:27:55,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844124609] [2024-09-25 11:27:55,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844124609] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:27:55,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852688581] [2024-09-25 11:27:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 11:27:55,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:27:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:27:55,573 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) [2024-09-25 11:27:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 11:27:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:27:55,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 11:27:55,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:27:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:27:57,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:28:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852688581] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:06,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:06,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 46 [2024-09-25 11:28:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773671964] [2024-09-25 11:28:06,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:06,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 11:28:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 11:28:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 11:28:06,801 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) [2024-09-25 11:28:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:11,361 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2024-09-25 11:28:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:28:11,362 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 [2024-09-25 11:28:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:11,364 INFO L225 Difference]: With dead ends: 154 [2024-09-25 11:28:11,364 INFO L226 Difference]: Without dead ends: 150 [2024-09-25 11:28:11,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=386, Invalid=3036, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 11:28:11,366 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:11,366 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 869 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-25 11:28:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-25 11:28:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2024-09-25 11:28:11,400 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) [2024-09-25 11:28:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-25 11:28:11,401 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 62 [2024-09-25 11:28:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:11,401 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-25 11:28:11,401 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) [2024-09-25 11:28:11,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-25 11:28:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 11:28:11,402 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:11,402 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] [2024-09-25 11:28:11,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-25 11:28:11,603 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 [2024-09-25 11:28:11,603 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:11,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1743105565, now seen corresponding path program 8 times [2024-09-25 11:28:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:11,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981842387] [2024-09-25 11:28:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:11,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:11,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:11,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:28:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:11,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:12,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:12,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:12,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:28:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:13,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:13,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:28:13,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981842387] [2024-09-25 11:28:13,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981842387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434199560] [2024-09-25 11:28:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:28:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:13,394 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) [2024-09-25 11:28:13,395 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 11:28:13,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:28:13,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:13,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-25 11:28:13,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:28:15,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:28:22,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434199560] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:22,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:22,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 50 [2024-09-25 11:28:22,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741245799] [2024-09-25 11:28:22,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:22,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-25 11:28:22,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-25 11:28:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 11:28:22,662 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) [2024-09-25 11:28:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:26,984 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2024-09-25 11:28:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:28:26,984 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 [2024-09-25 11:28:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:26,985 INFO L225 Difference]: With dead ends: 148 [2024-09-25 11:28:26,985 INFO L226 Difference]: Without dead ends: 144 [2024-09-25 11:28:26,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 11:28:26,987 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:26,987 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 811 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-25 11:28:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-25 11:28:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 91. [2024-09-25 11:28:27,024 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) [2024-09-25 11:28:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-25 11:28:27,025 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 62 [2024-09-25 11:28:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:27,025 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-25 11:28:27,025 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) [2024-09-25 11:28:27,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-25 11:28:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 11:28:27,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:27,026 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] [2024-09-25 11:28:27,042 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:27,227 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 [2024-09-25 11:28:27,227 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:27,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash -913631875, now seen corresponding path program 9 times [2024-09-25 11:28:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:27,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428666844] [2024-09-25 11:28:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:27,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:27,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:27,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:28:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:27,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:27,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:27,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:28,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:28:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:28,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:28,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-25 11:28:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428666844] [2024-09-25 11:28:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428666844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524140634] [2024-09-25 11:28:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:28:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:28,418 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) [2024-09-25 11:28:28,419 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 11:28:28,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 11:28:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:28,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-25 11:28:28,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-25 11:28:29,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-25 11:28:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524140634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:34,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 30 [2024-09-25 11:28:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605541930] [2024-09-25 11:28:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:34,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:28:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:28:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:28:34,837 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) [2024-09-25 11:28:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:36,631 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2024-09-25 11:28:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:28:36,631 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 [2024-09-25 11:28:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:36,632 INFO L225 Difference]: With dead ends: 127 [2024-09-25 11:28:36,632 INFO L226 Difference]: Without dead ends: 123 [2024-09-25 11:28:36,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 11:28:36,633 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:36,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-25 11:28:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-25 11:28:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2024-09-25 11:28:36,674 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) [2024-09-25 11:28:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2024-09-25 11:28:36,675 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 62 [2024-09-25 11:28:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:36,675 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2024-09-25 11:28:36,675 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) [2024-09-25 11:28:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2024-09-25 11:28:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 11:28:36,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:36,676 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] [2024-09-25 11:28:36,689 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:36,877 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 [2024-09-25 11:28:36,877 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:36,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1047042077, now seen corresponding path program 10 times [2024-09-25 11:28:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044216170] [2024-09-25 11:28:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:36,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:28:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 11:28:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 11:28:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044216170] [2024-09-25 11:28:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044216170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845058825] [2024-09-25 11:28:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:28:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:37,821 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) [2024-09-25 11:28:37,822 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 11:28:37,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:28:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:37,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-25 11:28:37,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-25 11:28:38,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-25 11:28:45,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845058825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:45,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:45,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2024-09-25 11:28:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976169240] [2024-09-25 11:28:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:45,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 11:28:45,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 11:28:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:28:45,220 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) [2024-09-25 11:28:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:47,219 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2024-09-25 11:28:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:28:47,219 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 [2024-09-25 11:28:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:47,220 INFO L225 Difference]: With dead ends: 132 [2024-09-25 11:28:47,220 INFO L226 Difference]: Without dead ends: 128 [2024-09-25 11:28:47,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:28:47,221 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:47,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 453 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:28:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-25 11:28:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2024-09-25 11:28:47,271 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) [2024-09-25 11:28:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2024-09-25 11:28:47,272 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 62 [2024-09-25 11:28:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:47,272 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2024-09-25 11:28:47,272 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) [2024-09-25 11:28:47,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2024-09-25 11:28:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 11:28:47,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:47,274 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] [2024-09-25 11:28:47,291 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:47,474 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 [2024-09-25 11:28:47,475 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash 330869257, now seen corresponding path program 11 times [2024-09-25 11:28:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262359444] [2024-09-25 11:28:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:28:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:48,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-25 11:28:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:48,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 11:28:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:48,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:48,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:28:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-25 11:28:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262359444] [2024-09-25 11:28:48,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262359444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977976740] [2024-09-25 11:28:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:28:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:48,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:48,816 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) [2024-09-25 11:28:48,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 11:28:48,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-25 11:28:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:48,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 11:28:48,978 INFO L285 TraceCheckSpWp]: Computing forward predicates...