./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.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 a9b967e5 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/dijkstra-u_valuebound50.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 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 --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-dev-a9b967e-m [2024-09-12 15:47:07,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:47:07,874 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:47:07,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:47:07,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:47:07,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:47:07,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:47:07,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:47:07,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:47:07,905 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:47:07,905 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:47:07,905 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:47:07,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:47:07,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:47:07,910 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:47:07,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:47:07,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:47:07,911 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:47:07,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:47:07,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:47:07,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:47:07,914 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:47:07,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:47:07,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:47:07,915 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:47:07,915 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:47:07,915 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:47:07,916 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:47:07,916 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:47:07,916 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:47:07,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:47:07,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:47:07,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:47:07,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:47:07,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:47:07,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:47:07,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:47:07,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:47:07,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:47:07,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:47:07,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:47:07,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:47:07,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:47:08,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:47:08,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:47:08,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:47:08,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:47:08,283 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:47:08,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2024-09-12 15:47:09,895 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:47:10,067 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:47:10,069 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2024-09-12 15:47:10,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/700bd1898/78393b463d674261a0994d92bcd0760b/FLAGb02fe6975 [2024-09-12 15:47:10,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/700bd1898/78393b463d674261a0994d92bcd0760b [2024-09-12 15:47:10,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:47:10,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:47:10,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:47:10,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:47:10,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:47:10,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3975c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10, skipping insertion in model container [2024-09-12 15:47:10,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,131 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:47:10,283 WARN L247 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/dijkstra-u_valuebound50.c[525,538] [2024-09-12 15:47:10,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:47:10,327 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:47:10,339 WARN L247 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/dijkstra-u_valuebound50.c[525,538] [2024-09-12 15:47:10,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:47:10,389 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:47:10,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10 WrapperNode [2024-09-12 15:47:10,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:47:10,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:47:10,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:47:10,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:47:10,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,421 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:47:10,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:47:10,422 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:47:10,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:47:10,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:47:10,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,434 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,454 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]. [2024-09-12 15:47:10,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,466 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:47:10,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:47:10,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:47:10,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:47:10,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (1/1) ... [2024-09-12 15:47:10,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:47:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:47:10,514 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) [2024-09-12 15:47:10,516 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 [2024-09-12 15:47:10,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:47:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:47:10,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:47:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:47:10,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:47:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:47:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:47:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:47:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:47:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:47:10,621 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:47:10,623 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:47:10,916 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 15:47:10,917 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:47:10,943 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:47:10,944 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 15:47:10,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:47:10 BoogieIcfgContainer [2024-09-12 15:47:10,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:47:10,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:47:10,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:47:10,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:47:10,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:47:10" (1/3) ... [2024-09-12 15:47:10,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec16373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:47:10, skipping insertion in model container [2024-09-12 15:47:10,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:47:10" (2/3) ... [2024-09-12 15:47:10,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec16373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:47:10, skipping insertion in model container [2024-09-12 15:47:10,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:47:10" (3/3) ... [2024-09-12 15:47:10,955 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.c [2024-09-12 15:47:10,969 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:47:10,970 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:47:11,028 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:47:11,035 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;@368d60d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:47:11,035 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:47:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:47:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 15:47:11,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:47:11,050 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:47:11,050 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:47:11,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 570623365, now seen corresponding path program 1 times [2024-09-12 15:47:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:47:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897520619] [2024-09-12 15:47:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:47:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:47:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:47:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:47:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:11,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:47:11,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897520619] [2024-09-12 15:47:11,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897520619] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:47:11,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:47:11,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:47:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405723840] [2024-09-12 15:47:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:47:11,274 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:47:11,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:47:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:47:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:47:11,301 INFO L87 Difference]: Start difference. First operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:47:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:47:11,332 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2024-09-12 15:47:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:47:11,335 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, (5), 2 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 [2024-09-12 15:47:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:47:11,340 INFO L225 Difference]: With dead ends: 66 [2024-09-12 15:47:11,340 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 15:47:11,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:47:11,346 INFO L434 NwaCegarLoop]: 45 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, 45 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 [2024-09-12 15:47:11,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:47:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 15:47:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 15:47:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:47:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-09-12 15:47:11,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 22 [2024-09-12 15:47:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:47:11,389 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-09-12 15:47:11,390 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:47:11,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-09-12 15:47:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 15:47:11,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:47:11,393 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] [2024-09-12 15:47:11,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:47:11,393 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:47:11,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2095105318, now seen corresponding path program 1 times [2024-09-12 15:47:11,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:47:11,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396915838] [2024-09-12 15:47:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:47:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:47:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:47:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:47:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:11,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:47:11,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396915838] [2024-09-12 15:47:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396915838] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:47:11,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:47:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 15:47:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191369884] [2024-09-12 15:47:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:47:11,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:47:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:47:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:47:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:47:11,960 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-09-12 15:47:13,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:47:17,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:47:21,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:47:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:47:21,302 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2024-09-12 15:47:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:47:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 23 [2024-09-12 15:47:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:47:21,319 INFO L225 Difference]: With dead ends: 64 [2024-09-12 15:47:21,319 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 15:47:21,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:47:21,321 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:47:21,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 184 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2024-09-12 15:47:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 15:47:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-12 15:47:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:47:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-09-12 15:47:21,342 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2024-09-12 15:47:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:47:21,342 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-09-12 15:47:21,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-09-12 15:47:21,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-09-12 15:47:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 15:47:21,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:47:21,344 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] [2024-09-12 15:47:21,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:47:21,345 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:47:21,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1429886677, now seen corresponding path program 1 times [2024-09-12 15:47:21,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:47:21,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128378024] [2024-09-12 15:47:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:21,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:47:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:21,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:47:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:21,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:47:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:21,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:47:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:47:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128378024] [2024-09-12 15:47:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128378024] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:47:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098695170] [2024-09-12 15:47:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:21,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:47:21,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:47:21,751 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) [2024-09-12 15:47:21,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:47:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:21,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:47:21,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:47:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:22,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:47:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098695170] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:47:22,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:47:22,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-12 15:47:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756780702] [2024-09-12 15:47:22,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:47:22,240 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:47:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:47:22,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:47:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:47:22,246 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:47:27,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:47:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:47:27,906 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-09-12 15:47:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:47:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-12 15:47:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:47:27,909 INFO L225 Difference]: With dead ends: 115 [2024-09-12 15:47:27,910 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 15:47:27,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:47:27,911 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 113 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:47:27,912 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 304 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-09-12 15:47:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 15:47:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2024-09-12 15:47:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-12 15:47:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-09-12 15:47:27,933 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 25 [2024-09-12 15:47:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:47:27,934 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-09-12 15:47:27,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:47:27,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-09-12 15:47:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:47:27,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:47:27,936 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:47:27,954 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:47:28,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:47:28,141 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:47:28,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1189191834, now seen corresponding path program 1 times [2024-09-12 15:47:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:47:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123097386] [2024-09-12 15:47:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:47:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:47:28,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852114109] [2024-09-12 15:47:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:28,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:47:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:47:28,190 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) [2024-09-12 15:47:28,192 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:47:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:28,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:47:28,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:47:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:47:28,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:47:28,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:47:28,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123097386] [2024-09-12 15:47:28,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:47:28,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852114109] [2024-09-12 15:47:28,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852114109] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:47:28,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:47:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:47:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974227376] [2024-09-12 15:47:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:47:28,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:47:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:47:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:47:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:47:28,310 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 15:47:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:47:28,423 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2024-09-12 15:47:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:47:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 33 [2024-09-12 15:47:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:47:28,426 INFO L225 Difference]: With dead ends: 90 [2024-09-12 15:47:28,429 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 15:47:28,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:47:28,431 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:47:28,431 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:47:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 15:47:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-12 15:47:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-12 15:47:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2024-09-12 15:47:28,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 33 [2024-09-12 15:47:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:47:28,466 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2024-09-12 15:47:28,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 15:47:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2024-09-12 15:47:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:47:28,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:47:28,469 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:47:28,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 15:47:28,670 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 [2024-09-12 15:47:28,670 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:47:28,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:47:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1682280212, now seen corresponding path program 1 times [2024-09-12 15:47:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:47:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279937890] [2024-09-12 15:47:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:47:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:47:28,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991699374] [2024-09-12 15:47:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:47:28,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:47:28,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:47:28,703 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) [2024-09-12 15:47:28,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:47:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:47:28,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 15:47:28,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:47:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:28,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:47:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:47:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:47:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279937890] [2024-09-12 15:47:30,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:47:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991699374] [2024-09-12 15:47:30,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991699374] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:47:30,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:47:30,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-12 15:47:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354212668] [2024-09-12 15:47:30,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:47:30,486 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:47:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:47:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:47:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:47:30,487 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:47:42,476 WARN L293 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 29 DAG size of output: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 15:47:46,489 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 [] [2024-09-12 15:47:48,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:47:53,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:47:59,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:03,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:07,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:11,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:15,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:19,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:24,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:28,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:33,150 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 [] [2024-09-12 15:48:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:48:34,035 INFO L93 Difference]: Finished difference Result 156 states and 226 transitions. [2024-09-12 15:48:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:48:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-09-12 15:48:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:48:34,037 INFO L225 Difference]: With dead ends: 156 [2024-09-12 15:48:34,037 INFO L226 Difference]: Without dead ends: 132 [2024-09-12 15:48:34,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2024-09-12 15:48:34,038 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 55 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:48:34,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 297 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 199 Invalid, 11 Unknown, 0 Unchecked, 51.7s Time] [2024-09-12 15:48:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-12 15:48:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2024-09-12 15:48:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 15:48:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2024-09-12 15:48:34,075 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 32 [2024-09-12 15:48:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:48:34,076 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2024-09-12 15:48:34,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:48:34,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2024-09-12 15:48:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:48:34,078 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:48:34,078 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:48:34,086 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:48:34,282 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 [2024-09-12 15:48:34,283 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:48:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -7962503, now seen corresponding path program 1 times [2024-09-12 15:48:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:48:34,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881750882] [2024-09-12 15:48:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:48:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:48:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628047246] [2024-09-12 15:48:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:48:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:48:34,325 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) [2024-09-12 15:48:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:48:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:34,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:48:34,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:48:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 15:48:34,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:48:34,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:48:34,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881750882] [2024-09-12 15:48:34,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:48:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628047246] [2024-09-12 15:48:34,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628047246] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:48:34,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:48:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 15:48:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264920930] [2024-09-12 15:48:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:48:34,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:48:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:48:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:48:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:48:34,569 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 15:48:36,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 15:48:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:48:36,551 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2024-09-12 15:48:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:48:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-09-12 15:48:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:48:36,555 INFO L225 Difference]: With dead ends: 140 [2024-09-12 15:48:36,555 INFO L226 Difference]: Without dead ends: 138 [2024-09-12 15:48:36,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:48:36,556 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:48:36,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 256 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-12 15:48:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-12 15:48:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-09-12 15:48:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 57 states have call successors, (57), 14 states have call predecessors, (57), 13 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 15:48:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 189 transitions. [2024-09-12 15:48:36,600 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 189 transitions. Word has length 44 [2024-09-12 15:48:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:48:36,600 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 189 transitions. [2024-09-12 15:48:36,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 15:48:36,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 189 transitions. [2024-09-12 15:48:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:48:36,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:48:36,604 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:48:36,620 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:48:36,804 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 [2024-09-12 15:48:36,804 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:48:36,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash -409333978, now seen corresponding path program 1 times [2024-09-12 15:48:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:48:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762942730] [2024-09-12 15:48:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:48:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:48:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835028154] [2024-09-12 15:48:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:36,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:48:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:48:36,838 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) [2024-09-12 15:48:36,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:48:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:36,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:48:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:48:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 15:48:37,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:48:41,315 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 4294967295 c_main_~n~0) c_main_~r~0 (* c_main_~p~0 c_main_~p~0)) 4294967296) 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* main_~q~0 main_~q~0 4294967295 c_main_~h~0) (* 4294967292 main_~q~0 main_~q~0 c_main_~p~0) (* main_~q~0 c_main_~r~0 12 c_main_~h~0) (* main_~q~0 16 c_main_~p~0 c_main_~n~0) (* c_main_~h~0 c_main_~h~0 c_main_~h~0) (* main_~q~0 c_main_~n~0 4294967284 c_main_~h~0) (* main_~q~0 c_main_~p~0 c_main_~r~0 4294967280)) 4294967296) 0)))) is different from false [2024-09-12 15:48:41,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:48:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762942730] [2024-09-12 15:48:41,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:48:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835028154] [2024-09-12 15:48:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835028154] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:48:41,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:48:41,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 15:48:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410321994] [2024-09-12 15:48:41,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:48:41,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:48:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:48:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:48:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2024-09-12 15:48:41,323 INFO L87 Difference]: Start difference. First operand 138 states and 189 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 15:48:45,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:48:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:48:45,793 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2024-09-12 15:48:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:48:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2024-09-12 15:48:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:48:45,795 INFO L225 Difference]: With dead ends: 156 [2024-09-12 15:48:45,795 INFO L226 Difference]: Without dead ends: 138 [2024-09-12 15:48:45,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2024-09-12 15:48:45,796 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:48:45,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 120 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 120 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-12 15:48:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-12 15:48:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-09-12 15:48:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 56 states have call successors, (56), 14 states have call predecessors, (56), 13 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-12 15:48:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2024-09-12 15:48:45,823 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 59 [2024-09-12 15:48:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:48:45,824 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2024-09-12 15:48:45,824 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 15:48:45,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2024-09-12 15:48:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:48:45,826 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:48:45,826 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:48:45,843 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:48:46,027 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 15:48:46,028 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:48:46,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:48:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash 382001091, now seen corresponding path program 1 times [2024-09-12 15:48:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:48:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656457809] [2024-09-12 15:48:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:48:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:48:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:48:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:48:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:48:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:48:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:48:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:48:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:48:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:48:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 15:48:46,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:48:46,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656457809] [2024-09-12 15:48:46,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656457809] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:48:46,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146188669] [2024-09-12 15:48:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:48:46,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:48:46,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:48:46,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:48:46,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:48:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:48:46,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:48:46,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:48:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:48:47,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:49:13,041 WARN L293 SmtUtils]: Spent 12.10s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 15:49:51,022 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 15:49:59,121 WARN L293 SmtUtils]: Spent 8.09s 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) [2024-09-12 15:50:07,250 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse11 (div (mod c_main_~q~0 4294967296) 4)) (.cse2 (* 2 (div (mod c_main_~p~0 4294967296) 2)))) (let ((.cse4 (mod (+ (* 2 c_main_~p~0) c_main_~q~0) 4294967296)) (.cse0 (* (div (+ (* 3 .cse11) .cse2) 4294967296) 4294967296)) (.cse1 (* 4 .cse11)) (.cse3 (* (div (+ (* (- 1) .cse11) (* (- 1) c_main_~p~0)) 4294967296) 4294967296)) (.cse6 (* c_main_~q~0 c_main_~q~0 4294967295 c_main_~p~0)) (.cse7 (* c_main_~p~0 c_main_~h~0 c_main_~h~0)) (.cse8 (* c_main_~q~0 c_main_~p~0 c_main_~n~0 4)) (.cse9 (* 4294967292 c_main_~q~0 c_main_~n~0 c_main_~h~0))) (and (forall ((v_y_6 Int) (v_z_6 Int)) (let ((.cse5 (* v_y_6 4294967296))) (or (< 4294967295 v_z_6) (< (+ .cse0 v_z_6) (+ .cse1 c_main_~p~0 .cse2 .cse3 4294967296)) (< .cse4 (+ .cse5 v_z_6 1)) (< (+ .cse5 v_z_6) 0) (not (= (mod (+ .cse6 (* c_main_~q~0 v_z_6 4 c_main_~h~0) .cse7 .cse8 (* 4294967292 c_main_~q~0 c_main_~p~0 v_z_6) .cse9) 4294967296) 0))))) (forall ((v_y_6 Int) (v_z_6 Int)) (let ((.cse10 (* v_y_6 4294967296))) (or (< .cse4 (+ .cse10 v_z_6 1)) (< (+ .cse10 v_z_6) (mod (+ c_main_~p~0 .cse11) 4294967296)) (< v_z_6 0) (< 4294967295 (+ v_z_6 (mod (+ (* 4294967295 .cse11) (* 4294967295 c_main_~p~0)) 4294967296))) (< (+ .cse0 v_z_6) (+ .cse1 c_main_~p~0 .cse2 .cse3)) (not (= (mod (+ .cse6 (* c_main_~q~0 v_z_6 4 c_main_~h~0) .cse7 .cse8 (* 4294967292 c_main_~q~0 c_main_~p~0 v_z_6) .cse9) 4294967296) 0)))))))) is different from true [2024-09-12 15:50:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146188669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:50:07,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:50:07,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2024-09-12 15:50:07,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703692241] [2024-09-12 15:50:07,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:50:07,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:50:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:50:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:50:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=473, Unknown=2, NotChecked=44, Total=600 [2024-09-12 15:50:07,253 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 15:50:12,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:13,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:17,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:21,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:25,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:29,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:33,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:37,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:41,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:45,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:49,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:54,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:50:58,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:51:02,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:51:06,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 15:51:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:51:06,466 INFO L93 Difference]: Finished difference Result 182 states and 245 transitions. [2024-09-12 15:51:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:51:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-12 15:51:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:51:06,470 INFO L225 Difference]: With dead ends: 182 [2024-09-12 15:51:06,470 INFO L226 Difference]: Without dead ends: 151 [2024-09-12 15:51:06,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=117, Invalid=697, Unknown=2, NotChecked=54, Total=870 [2024-09-12 15:51:06,472 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 21 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:51:06,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 459 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 424 Invalid, 14 Unknown, 0 Unchecked, 59.0s Time] [2024-09-12 15:51:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-12 15:51:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-12 15:51:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 56 states have call successors, (56), 17 states have call predecessors, (56), 16 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-12 15:51:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2024-09-12 15:51:06,515 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 58 [2024-09-12 15:51:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:51:06,515 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2024-09-12 15:51:06,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 15:51:06,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:51:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2024-09-12 15:51:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:51:06,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:51:06,518 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:51:06,536 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 15:51:06,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:51:06,719 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:51:06,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:51:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1682429464, now seen corresponding path program 2 times [2024-09-12 15:51:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:51:06,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699135601] [2024-09-12 15:51:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:51:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:51:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:51:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:51:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:51:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:51:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:51:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:51:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:51:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:51:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:51:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:51:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 15:51:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:51:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699135601] [2024-09-12 15:51:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699135601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:51:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783634978] [2024-09-12 15:51:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:51:07,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:51:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:51:07,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:51:07,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:51:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:51:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:51:07,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:51:07,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:51:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-12 15:51:09,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:51:22,465 WARN L293 SmtUtils]: Spent 8.04s 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) [2024-09-12 15:51:43,487 WARN L293 SmtUtils]: Spent 19.46s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)