./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/geo1-ll_unwindbound100.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 da898716740ad35966dda711f1bb2c8a4ed9a1f902850db9abe2ca7b7514eaea --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:18:31,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:18:32,048 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:18:32,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:18:32,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:18:32,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:18:32,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:18:32,088 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:18:32,089 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:18:32,092 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:18:32,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:18:32,092 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:18:32,093 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:18:32,093 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:18:32,094 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:18:32,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:18:32,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:18:32,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:18:32,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:18:32,095 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:18:32,095 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:18:32,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:18:32,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:18:32,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:18:32,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:18:32,098 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:18:32,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:18:32,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:18:32,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:18:32,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:18:32,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:18:32,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:18:32,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:18:32,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:18:32,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:18:32,102 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:18:32,102 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:18:32,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:18:32,102 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:18:32,103 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:18:32,103 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:18:32,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:18:32,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da898716740ad35966dda711f1bb2c8a4ed9a1f902850db9abe2ca7b7514eaea Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:18:32,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:18:32,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:18:32,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:18:32,473 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:18:32,473 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:18:32,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c [2024-09-15 19:18:34,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:18:34,245 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:18:34,246 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c [2024-09-15 19:18:34,255 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/511882fd1/be3c2941293b47bf8a421582358396b1/FLAG1113742b3 [2024-09-15 19:18:34,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/511882fd1/be3c2941293b47bf8a421582358396b1 [2024-09-15 19:18:34,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:18:34,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:18:34,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:18:34,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:18:34,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:18:34,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8bdb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34, skipping insertion in model container [2024-09-15 19:18:34,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,310 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:18:34,467 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/geo1-ll_unwindbound100.c[546,559] [2024-09-15 19:18:34,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:18:34,504 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:18:34,516 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/geo1-ll_unwindbound100.c[546,559] [2024-09-15 19:18:34,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:18:34,543 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:18:34,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34 WrapperNode [2024-09-15 19:18:34,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:18:34,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:18:34,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:18:34,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:18:34,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,558 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,565 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:18:34,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:18:34,567 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:18:34,567 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:18:34,567 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:18:34,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,579 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,601 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]. [2024-09-15 19:18:34,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:18:34,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:18:34,615 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:18:34,615 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:18:34,616 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (1/1) ... [2024-09-15 19:18:34,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:18:34,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:18:34,651 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) [2024-09-15 19:18:34,654 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 [2024-09-15 19:18:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:18:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:18:34,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:18:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:18:34,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:18:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:18:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:18:34,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:18:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:18:34,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:18:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:18:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:18:34,771 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:18:34,773 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:18:34,970 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-15 19:18:34,973 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:18:35,003 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:18:35,004 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:18:35,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:18:35 BoogieIcfgContainer [2024-09-15 19:18:35,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:18:35,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:18:35,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:18:35,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:18:35,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:18:34" (1/3) ... [2024-09-15 19:18:35,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed498f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:18:35, skipping insertion in model container [2024-09-15 19:18:35,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:34" (2/3) ... [2024-09-15 19:18:35,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed498f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:18:35, skipping insertion in model container [2024-09-15 19:18:35,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:18:35" (3/3) ... [2024-09-15 19:18:35,015 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound100.c [2024-09-15 19:18:35,032 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:18:35,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:18:35,101 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:18:35,110 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;@4e94dbec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:18:35,111 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:18:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:18:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 19:18:35,123 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:18:35,124 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:18:35,124 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:18:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1666515900, now seen corresponding path program 1 times [2024-09-15 19:18:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:18:35,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838974218] [2024-09-15 19:18:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:18:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:35,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:18:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:35,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:18:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:35,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:18:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:18:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838974218] [2024-09-15 19:18:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838974218] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:18:35,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:18:35,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:18:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425070465] [2024-09-15 19:18:35,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:18:35,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:18:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:18:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:18:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:18:35,432 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:18:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:18:35,541 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-15 19:18:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:18:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-15 19:18:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:18:35,552 INFO L225 Difference]: With dead ends: 51 [2024-09-15 19:18:35,552 INFO L226 Difference]: Without dead ends: 25 [2024-09-15 19:18:35,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:18:35,559 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:18:35,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:18:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-15 19:18:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-15 19:18:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:18:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-15 19:18:35,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2024-09-15 19:18:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:18:35,599 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-15 19:18:35,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:18:35,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-15 19:18:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 19:18:35,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:18:35,602 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:18:35,602 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:18:35,603 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:18:35,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:35,603 INFO L85 PathProgramCache]: Analyzing trace with hash -387848543, now seen corresponding path program 1 times [2024-09-15 19:18:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:18:35,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335627763] [2024-09-15 19:18:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:18:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:18:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333878389] [2024-09-15 19:18:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:35,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:18:35,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:18:35,642 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) [2024-09-15 19:18:35,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:18:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:35,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 19:18:35,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:18:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:35,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:18:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:18:35,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335627763] [2024-09-15 19:18:35,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:18:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333878389] [2024-09-15 19:18:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333878389] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:18:35,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:18:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:18:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073647160] [2024-09-15 19:18:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:18:35,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:18:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:18:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:18:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:18:35,806 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:18:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:18:35,856 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-15 19:18:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:18:35,857 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-15 19:18:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:18:35,858 INFO L225 Difference]: With dead ends: 35 [2024-09-15 19:18:35,858 INFO L226 Difference]: Without dead ends: 33 [2024-09-15 19:18:35,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:18:35,859 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:18:35,860 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:18:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-15 19:18:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-15 19:18:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:18:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-15 19:18:35,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2024-09-15 19:18:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:18:35,870 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-15 19:18:35,871 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:18:35,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-15 19:18:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 19:18:35,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:18:35,872 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:18:35,890 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:18:36,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:18:36,077 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:18:36,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash 783720481, now seen corresponding path program 1 times [2024-09-15 19:18:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:18:36,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885438265] [2024-09-15 19:18:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:18:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:18:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:18:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:18:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:36,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:18:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885438265] [2024-09-15 19:18:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885438265] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:18:36,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:18:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:18:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734064015] [2024-09-15 19:18:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:18:36,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:18:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:18:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:18:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:18:36,292 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:18:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:18:36,370 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-15 19:18:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:18:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-15 19:18:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:18:36,373 INFO L225 Difference]: With dead ends: 39 [2024-09-15 19:18:36,374 INFO L226 Difference]: Without dead ends: 31 [2024-09-15 19:18:36,374 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:18:36,375 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:18:36,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:18:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-15 19:18:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-15 19:18:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:18:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-15 19:18:36,389 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2024-09-15 19:18:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:18:36,389 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-15 19:18:36,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:18:36,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-15 19:18:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 19:18:36,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:18:36,393 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:18:36,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:18:36,393 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:18:36,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1293449266, now seen corresponding path program 1 times [2024-09-15 19:18:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:18:36,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001759380] [2024-09-15 19:18:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:18:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:18:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:18:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:18:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 19:18:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:36,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:18:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001759380] [2024-09-15 19:18:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001759380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:18:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198403703] [2024-09-15 19:18:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:18:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:18:36,741 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) [2024-09-15 19:18:36,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:18:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:36,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-15 19:18:36,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:18:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:36,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:18:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:18:37,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198403703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:18:37,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:18:37,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2024-09-15 19:18:37,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555936026] [2024-09-15 19:18:37,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:18:37,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:18:37,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:18:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:18:37,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:18:37,207 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:18:41,409 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 [] [2024-09-15 19:18:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:18:41,453 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-15 19:18:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:18:41,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-09-15 19:18:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:18:41,455 INFO L225 Difference]: With dead ends: 45 [2024-09-15 19:18:41,455 INFO L226 Difference]: Without dead ends: 39 [2024-09-15 19:18:41,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:18:41,461 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:18:41,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-15 19:18:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-15 19:18:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-15 19:18:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:18:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-15 19:18:41,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2024-09-15 19:18:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:18:41,478 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-15 19:18:41,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:18:41,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-15 19:18:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 19:18:41,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:18:41,482 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:18:41,501 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:18:41,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:18:41,683 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:18:41,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:18:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1959775791, now seen corresponding path program 1 times [2024-09-15 19:18:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:18:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717242860] [2024-09-15 19:18:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:18:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:18:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278218854] [2024-09-15 19:18:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:18:41,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:18:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:18:41,739 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) [2024-09-15 19:18:41,741 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:18:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:18:41,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 19:18:41,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:18:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:18:42,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:18:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:18:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:18:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717242860] [2024-09-15 19:18:57,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:18:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278218854] [2024-09-15 19:18:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278218854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:18:57,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:18:57,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-15 19:18:57,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156641099] [2024-09-15 19:18:57,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:18:57,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:18:57,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:18:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:18:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2024-09-15 19:18:57,738 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:19:11,185 WARN L293 SmtUtils]: Spent 9.48s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:19:15,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:29,291 WARN L293 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:19:33,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:37,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:41,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:45,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:49,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:19:53,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:13,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:17,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:21,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:25,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:29,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:33,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:37,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:41,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:45,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:49,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:53,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:20:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:20:53,569 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-15 19:20:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:20:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38 [2024-09-15 19:20:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:20:53,572 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:20:53,572 INFO L226 Difference]: Without dead ends: 64 [2024-09-15 19:20:53,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=74, Invalid=259, Unknown=9, NotChecked=0, Total=342 [2024-09-15 19:20:53,573 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:20:53,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 73.0s Time] [2024-09-15 19:20:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-15 19:20:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-15 19:20:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:20:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-15 19:20:53,595 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 38 [2024-09-15 19:20:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:20:53,597 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-15 19:20:53,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:20:53,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:20:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-15 19:20:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 19:20:53,599 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:20:53,599 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-15 19:20:53,612 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:20:53,799 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:20:53,800 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:20:53,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:20:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -701383951, now seen corresponding path program 1 times [2024-09-15 19:20:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:20:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470892766] [2024-09-15 19:20:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:20:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:20:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:20:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:20:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:20:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 19:20:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 19:20:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:20:53,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:20:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470892766] [2024-09-15 19:20:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470892766] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:20:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271056296] [2024-09-15 19:20:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:20:53,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:20:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:20:53,984 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) [2024-09-15 19:20:53,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:20:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:20:54,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:20:54,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:20:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:20:54,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:20:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:20:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271056296] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:20:54,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:20:54,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-15 19:20:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152672806] [2024-09-15 19:20:54,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:20:54,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:20:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:20:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:20:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:20:54,213 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 19:20:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:20:54,443 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-15 19:20:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:20:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 39 [2024-09-15 19:20:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:20:54,446 INFO L225 Difference]: With dead ends: 79 [2024-09-15 19:20:54,446 INFO L226 Difference]: Without dead ends: 71 [2024-09-15 19:20:54,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:20:54,447 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:20:54,447 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:20:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-15 19:20:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-15 19:20:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 51 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:20:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-09-15 19:20:54,479 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 39 [2024-09-15 19:20:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:20:54,480 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-09-15 19:20:54,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 19:20:54,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:20:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-09-15 19:20:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-15 19:20:54,484 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:20:54,484 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:20:54,502 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:20:54,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:20:54,685 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:20:54,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:20:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1815586865, now seen corresponding path program 2 times [2024-09-15 19:20:54,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:20:54,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855273286] [2024-09-15 19:20:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:20:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:20:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:20:54,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532332514] [2024-09-15 19:20:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:20:54,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:20:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:20:54,792 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) [2024-09-15 19:20:54,793 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:20:54,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:20:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:20:54,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 19:20:55,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:20:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 19:20:55,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:21:53,601 WARN L876 $PredicateComparison]: unable to prove that (= (mod (+ (* 18446744073709551615 c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* 18446744073709551615 c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) 18446744073709551616) 0) is different from true [2024-09-15 19:22:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 55 times theorem prover too weak. 64 trivial. 23 not checked. [2024-09-15 19:22:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:22:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855273286] [2024-09-15 19:22:22,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:22:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532332514] [2024-09-15 19:22:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532332514] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:22:22,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:22:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2024-09-15 19:22:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778745579] [2024-09-15 19:22:22,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:22:22,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:22:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:22:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:22:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=389, Unknown=17, NotChecked=42, Total=552 [2024-09-15 19:22:22,004 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 14 states have call predecessors, (17), 15 states have call successors, (17) [2024-09-15 19:22:27,135 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 [] [2024-09-15 19:22:55,456 WARN L293 SmtUtils]: Spent 26.49s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)