./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:22:34,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:22:35,003 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:22:35,007 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:22:35,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:22:35,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:22:35,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:22:35,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:22:35,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:22:35,038 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:22:35,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:22:35,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:22:35,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:22:35,039 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:22:35,040 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:22:35,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:22:35,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:22:35,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:22:35,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:22:35,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:22:35,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:22:35,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:22:35,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:22:35,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:22:35,046 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:22:35,050 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:22:35,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:22:35,051 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:22:35,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:22:35,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:22:35,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:22:35,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:22:35,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:22:35,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:22:35,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:22:35,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:22:35,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:22:35,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:22:35,053 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:22:35,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:22:35,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:22:35,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:22:35,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:22:35,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:22:35,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:22:35,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:22:35,332 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:22:35,333 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:22:35,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2024-09-18 16:22:36,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:22:36,886 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:22:36,887 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2024-09-18 16:22:36,897 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bfb8cbeba/5f6f73b34416472f9aa0a41698f80b5c/FLAG24657be01 [2024-09-18 16:22:36,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bfb8cbeba/5f6f73b34416472f9aa0a41698f80b5c [2024-09-18 16:22:36,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:22:36,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:22:36,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:22:36,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:22:36,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:22:36,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:22:36" (1/1) ... [2024-09-18 16:22:36,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142633f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:36, skipping insertion in model container [2024-09-18 16:22:36,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:22:36" (1/1) ... [2024-09-18 16:22:36,936 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:22:37,085 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2024-09-18 16:22:37,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:22:37,108 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:22:37,119 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2024-09-18 16:22:37,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:22:37,139 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:22:37,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37 WrapperNode [2024-09-18 16:22:37,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:22:37,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:22:37,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:22:37,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:22:37,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,164 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:22:37,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:22:37,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:22:37,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:22:37,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:22:37,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,185 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 16:22:37,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:22:37,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:22:37,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:22:37,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:22:37,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (1/1) ... [2024-09-18 16:22:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:22:37,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:37,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:22:37,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 16:22:37,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:22:37,268 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:22:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:22:37,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:22:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:22:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:22:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:22:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:22:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:22:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:22:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:22:37,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:22:37,317 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:22:37,318 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:22:37,487 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:22:37,488 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:22:37,503 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:22:37,503 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 16:22:37,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:22:37 BoogieIcfgContainer [2024-09-18 16:22:37,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:22:37,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:22:37,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:22:37,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:22:37,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:22:36" (1/3) ... [2024-09-18 16:22:37,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f328d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:22:37, skipping insertion in model container [2024-09-18 16:22:37,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:37" (2/3) ... [2024-09-18 16:22:37,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f328d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:22:37, skipping insertion in model container [2024-09-18 16:22:37,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:22:37" (3/3) ... [2024-09-18 16:22:37,512 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2024-09-18 16:22:37,527 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:22:37,527 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:22:37,575 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:22:37,581 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;@5cfc35a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:22:37,581 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:22:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 16:22:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:22:37,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:37,589 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:37,590 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:37,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-18 16:22:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699320443] [2024-09-18 16:22:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:37,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:37,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:37,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:37,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:37,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699320443] [2024-09-18 16:22:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699320443] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:37,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:37,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:22:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463540436] [2024-09-18 16:22:37,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:37,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:22:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:22:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:22:37,785 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:22:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:37,816 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-18 16:22:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:22:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-18 16:22:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:37,825 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:22:37,825 INFO L226 Difference]: Without dead ends: 32 [2024-09-18 16:22:37,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:22:37,831 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:37,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:22:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-18 16:22:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-18 16:22:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-18 16:22:37,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-18 16:22:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:37,870 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-18 16:22:37,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:22:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-18 16:22:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:22:37,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:37,873 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:37,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:22:37,873 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:37,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-18 16:22:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:37,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604646355] [2024-09-18 16:22:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:37,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604646355] [2024-09-18 16:22:38,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604646355] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:38,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:38,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:22:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006945647] [2024-09-18 16:22:38,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:38,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:22:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:22:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:22:38,207 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:22:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:38,292 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-18 16:22:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-18 16:22:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:38,294 INFO L225 Difference]: With dead ends: 45 [2024-09-18 16:22:38,294 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 16:22:38,294 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:22:38,295 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:38,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:22:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 16:22:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-18 16:22:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-18 16:22:38,316 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-18 16:22:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:38,317 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-18 16:22:38,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:22:38,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-18 16:22:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:22:38,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:38,320 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] [2024-09-18 16:22:38,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:22:38,321 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:38,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-18 16:22:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:38,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809065670] [2024-09-18 16:22:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:38,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809065670] [2024-09-18 16:22:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809065670] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:22:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159131952] [2024-09-18 16:22:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:38,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:22:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:22:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:22:38,732 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:22:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:38,857 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-18 16:22:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-18 16:22:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:38,861 INFO L225 Difference]: With dead ends: 49 [2024-09-18 16:22:38,862 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 16:22:38,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:22:38,863 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:38,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:22:38,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 16:22:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-18 16:22:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-18 16:22:38,876 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-18 16:22:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:38,876 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-18 16:22:38,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:22:38,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-18 16:22:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 16:22:38,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:38,879 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:38,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:22:38,879 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:38,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-18 16:22:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:38,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006004628] [2024-09-18 16:22:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892404872] [2024-09-18 16:22:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:38,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:22:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:38,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 16:22:38,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 16:22:39,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:22:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006004628] [2024-09-18 16:22:39,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:39,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892404872] [2024-09-18 16:22:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892404872] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:39,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-18 16:22:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378592607] [2024-09-18 16:22:39,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:39,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:22:39,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:22:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:22:39,193 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:22:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:39,454 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-18 16:22:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:22:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-09-18 16:22:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:39,455 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:22:39,456 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 16:22:39,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:22:39,457 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:39,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:22:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 16:22:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 16:22:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 16:22:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-18 16:22:39,480 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-18 16:22:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:39,480 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-18 16:22:39,481 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:22:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-18 16:22:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 16:22:39,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:39,482 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:39,499 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:39,686 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:39,687 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:39,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-18 16:22:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58570282] [2024-09-18 16:22:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647587583] [2024-09-18 16:22:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:39,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:39,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:22:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:39,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 16:22:39,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:40,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:22:41,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:41,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58570282] [2024-09-18 16:22:41,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:41,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647587583] [2024-09-18 16:22:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647587583] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:41,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:41,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-09-18 16:22:41,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029867086] [2024-09-18 16:22:41,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:41,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 16:22:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 16:22:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:22:41,402 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 16:22:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:41,894 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-18 16:22:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 16:22:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2024-09-18 16:22:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:41,898 INFO L225 Difference]: With dead ends: 71 [2024-09-18 16:22:41,898 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 16:22:41,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:22:41,901 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:41,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 188 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:22:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 16:22:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 16:22:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 16:22:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-09-18 16:22:41,923 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 44 [2024-09-18 16:22:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:41,923 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-09-18 16:22:41,924 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 16:22:41,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-09-18 16:22:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:22:41,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:41,925 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:41,948 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:42,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:42,126 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:42,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-18 16:22:42,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:42,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562490727] [2024-09-18 16:22:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637464848] [2024-09-18 16:22:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:42,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:42,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:22:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:42,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:22:42,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:22:42,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:22:42,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562490727] [2024-09-18 16:22:42,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637464848] [2024-09-18 16:22:42,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637464848] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:42,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:22:42,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-09-18 16:22:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688030893] [2024-09-18 16:22:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:42,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:22:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:22:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:22:42,470 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 16:22:46,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 16:22:50,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 16:22:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:50,651 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-18 16:22:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2024-09-18 16:22:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:50,652 INFO L225 Difference]: With dead ends: 73 [2024-09-18 16:22:50,652 INFO L226 Difference]: Without dead ends: 71 [2024-09-18 16:22:50,653 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:22:50,653 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:50,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-09-18 16:22:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-18 16:22:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-18 16:22:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 16:22:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-09-18 16:22:50,670 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 54 [2024-09-18 16:22:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:50,670 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-09-18 16:22:50,670 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 16:22:50,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-09-18 16:22:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-18 16:22:50,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:50,672 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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, 1] [2024-09-18 16:22:50,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:22:50,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:22:50,873 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:50,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -752924724, now seen corresponding path program 1 times [2024-09-18 16:22:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704316865] [2024-09-18 16:22:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:50,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:22:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:22:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 16:22:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 16:22:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 16:22:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:22:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:22:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-18 16:22:51,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:51,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704316865] [2024-09-18 16:22:51,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704316865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:51,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401069837] [2024-09-18 16:22:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:51,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:51,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:22:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:51,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-18 16:22:51,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-18 16:22:51,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:51,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401069837] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:22:51,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-09-18 16:22:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240426247] [2024-09-18 16:22:51,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:51,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 16:22:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 16:22:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:22:51,258 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 16:22:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:51,597 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2024-09-18 16:22:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:22:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 72 [2024-09-18 16:22:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:51,599 INFO L225 Difference]: With dead ends: 102 [2024-09-18 16:22:51,600 INFO L226 Difference]: Without dead ends: 94 [2024-09-18 16:22:51,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:22:51,601 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:51,602 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:22:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-18 16:22:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-09-18 16:22:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-18 16:22:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-18 16:22:51,635 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 72 [2024-09-18 16:22:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:51,636 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-18 16:22:51,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 16:22:51,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-18 16:22:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-18 16:22:51,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:51,641 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1] [2024-09-18 16:22:51,660 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:51,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:51,846 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:51,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-18 16:22:51,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:51,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008960426] [2024-09-18 16:22:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:51,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881495982] [2024-09-18 16:22:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:51,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:51,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:22:51,893 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:22:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:52,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-18 16:22:52,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 54 proven. 23 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-18 16:22:53,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:23:39,667 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:23:51,852 WARN L293 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:00,010 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:04,017 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_main_~d~0 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse3 (div .cse2 2)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse4 (mod c_main_~p~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse2)) (< (mod c_main_~r~0 4294967296) .cse3) (= .cse4 1) (= .cse0 (mod (+ (* 4294967295 .cse3) c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse4 2))) 4294967296))))) is different from true [2024-09-18 16:24:16,701 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:47,337 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:52,578 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:09,336 WARN L293 SmtUtils]: Spent 16.12s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:25,388 WARN L293 SmtUtils]: Spent 16.05s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:29,419 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_main_~d~0 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse4 (div .cse2 2)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse5 (mod c_main_~p~0 4294967296)) (.cse3 (mod c_main_~r~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse2)) (< .cse3 .cse4) (= .cse5 1) (= .cse0 (mod (+ (* 4294967295 .cse4) c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse5 2))) 4294967296)) (< .cse2 (+ 1 .cse3))))) is different from true [2024-09-18 16:25:38,585 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:46,608 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:04,534 WARN L293 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:20,550 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:33,421 WARN L293 SmtUtils]: Spent 8.82s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:41,870 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:27:06,142 WARN L293 SmtUtils]: Spent 21.60s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:27:14,392 WARN L293 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)