./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.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 2ad2bfafb2e5236f68c3ecdd808488f9d9b4cfe5e1ccbe679b253d376c8c4674 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:41:51,381 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:41:51,448 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:41:51,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:41:51,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:41:51,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:41:51,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:41:51,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:41:51,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:41:51,479 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:41:51,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:41:51,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:41:51,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:41:51,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:41:51,481 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:41:51,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:41:51,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:41:51,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:41:51,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:41:51,485 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:41:51,485 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:41:51,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:41:51,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:41:51,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:41:51,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:41:51,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:41:51,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:41:51,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:41:51,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:41:51,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:41:51,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:41:51,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:41:51,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ad2bfafb2e5236f68c3ecdd808488f9d9b4cfe5e1ccbe679b253d376c8c4674 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:41:51,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:41:51,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:41:51,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:41:51,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:41:51,700 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:41:51,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c [2024-09-24 23:41:52,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:41:52,995 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:41:52,996 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c [2024-09-24 23:41:53,004 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7746a0cae/bfbf79ce96554cd7b0af3d6247af518a/FLAGbedb2a17a [2024-09-24 23:41:53,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7746a0cae/bfbf79ce96554cd7b0af3d6247af518a [2024-09-24 23:41:53,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:41:53,413 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:41:53,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:41:53,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:41:53,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:41:53,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d66304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53, skipping insertion in model container [2024-09-24 23:41:53,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:41:53,549 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c[525,538] [2024-09-24 23:41:53,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:41:53,568 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:41:53,583 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c[525,538] [2024-09-24 23:41:53,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:41:53,616 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:41:53,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53 WrapperNode [2024-09-24 23:41:53,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:41:53,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:41:53,617 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:41:53,617 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:41:53,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,651 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:41:53,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:41:53,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:41:53,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:41:53,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:41:53,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,667 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,685 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]. [2024-09-24 23:41:53,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,691 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:41:53,696 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:41:53,696 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:41:53,696 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:41:53,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (1/1) ... [2024-09-24 23:41:53,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:41:53,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:41:53,723 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) [2024-09-24 23:41:53,728 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 [2024-09-24 23:41:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:41:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:41:53,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:41:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:41:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:41:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:41:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:41:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:41:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:41:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:41:53,813 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:41:53,815 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:41:53,914 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:41:53,914 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:41:53,931 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:41:53,931 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-24 23:41:53,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:41:53 BoogieIcfgContainer [2024-09-24 23:41:53,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:41:53,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:41:53,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:41:53,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:41:53,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:41:53" (1/3) ... [2024-09-24 23:41:53,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5d8e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:41:53, skipping insertion in model container [2024-09-24 23:41:53,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:41:53" (2/3) ... [2024-09-24 23:41:53,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5d8e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:41:53, skipping insertion in model container [2024-09-24 23:41:53,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:41:53" (3/3) ... [2024-09-24 23:41:53,938 INFO L112 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound2.c [2024-09-24 23:41:53,950 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:41:53,950 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:41:53,989 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:41:53,994 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;@50455fe2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:41:53,994 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:41:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:41:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-24 23:41:54,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:41:54,002 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:41:54,002 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:41:54,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1030420147, now seen corresponding path program 1 times [2024-09-24 23:41:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:41:54,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729341094] [2024-09-24 23:41:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:41:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:41:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:54,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:41:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729341094] [2024-09-24 23:41:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729341094] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:41:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:41:54,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:41:54,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278752287] [2024-09-24 23:41:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:41:54,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:41:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:41:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:41:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:41:54,149 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:41:54,191 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-09-24 23:41:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:41:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-24 23:41:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:41:54,197 INFO L225 Difference]: With dead ends: 36 [2024-09-24 23:41:54,197 INFO L226 Difference]: Without dead ends: 17 [2024-09-24 23:41:54,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:41:54,201 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:41:54,202 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:41:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-24 23:41:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-09-24 23:41:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:41:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-24 23:41:54,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-24 23:41:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:41:54,226 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-24 23:41:54,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-24 23:41:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-24 23:41:54,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:41:54,228 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:41:54,228 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:41:54,228 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:41:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2015485711, now seen corresponding path program 1 times [2024-09-24 23:41:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:41:54,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933293750] [2024-09-24 23:41:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:54,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:41:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:41:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:54,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:41:54,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933293750] [2024-09-24 23:41:54,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933293750] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:41:54,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:41:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:41:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867932633] [2024-09-24 23:41:54,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:41:54,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:41:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:41:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:41:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:41:54,366 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:41:54,423 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-09-24 23:41:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:41:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-24 23:41:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:41:54,424 INFO L225 Difference]: With dead ends: 25 [2024-09-24 23:41:54,424 INFO L226 Difference]: Without dead ends: 18 [2024-09-24 23:41:54,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:41:54,425 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:41:54,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:41:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-24 23:41:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-24 23:41:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:41:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-09-24 23:41:54,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2024-09-24 23:41:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:41:54,432 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-09-24 23:41:54,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-09-24 23:41:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-24 23:41:54,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:41:54,433 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:41:54,433 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:41:54,433 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:41:54,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2017273171, now seen corresponding path program 1 times [2024-09-24 23:41:54,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:41:54,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096240461] [2024-09-24 23:41:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:41:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:41:54,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069347301] [2024-09-24 23:41:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:54,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:41:54,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:41:54,461 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) [2024-09-24 23:41:54,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:41:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:41:54,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:41:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:54,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:41:54,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:41:54,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096240461] [2024-09-24 23:41:54,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:41:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069347301] [2024-09-24 23:41:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069347301] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:41:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:41:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:41:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344488034] [2024-09-24 23:41:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:41:54,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:41:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:41:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:41:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:41:54,572 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:41:54,614 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-09-24 23:41:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:41:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-24 23:41:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:41:54,615 INFO L225 Difference]: With dead ends: 27 [2024-09-24 23:41:54,615 INFO L226 Difference]: Without dead ends: 24 [2024-09-24 23:41:54,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:41:54,617 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:41:54,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:41:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-24 23:41:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-24 23:41:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:41:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-09-24 23:41:54,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2024-09-24 23:41:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:41:54,622 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-09-24 23:41:54,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:41:54,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-09-24 23:41:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:41:54,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:41:54,624 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:41:54,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:41:54,824 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 [2024-09-24 23:41:54,825 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:41:54,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash -810508528, now seen corresponding path program 1 times [2024-09-24 23:41:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:41:54,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255763252] [2024-09-24 23:41:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:41:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:54,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:41:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:55,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-24 23:41:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:41:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255763252] [2024-09-24 23:41:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255763252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:41:55,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595054929] [2024-09-24 23:41:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:41:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:41:55,025 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) [2024-09-24 23:41:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:41:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:55,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:41:55,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:41:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:55,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:41:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:55,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595054929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:41:55,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:41:55,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2024-09-24 23:41:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875973250] [2024-09-24 23:41:55,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:41:55,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 23:41:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:41:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 23:41:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:41:55,187 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:41:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:41:55,262 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-09-24 23:41:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:41:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2024-09-24 23:41:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:41:55,263 INFO L225 Difference]: With dead ends: 33 [2024-09-24 23:41:55,263 INFO L226 Difference]: Without dead ends: 26 [2024-09-24 23:41:55,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:41:55,264 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:41:55,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:41:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-24 23:41:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-24 23:41:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:41:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-09-24 23:41:55,273 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2024-09-24 23:41:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:41:55,274 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-09-24 23:41:55,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:41:55,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-09-24 23:41:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:41:55,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:41:55,275 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:41:55,289 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:41:55,480 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 [2024-09-24 23:41:55,481 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:41:55,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:41:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash -808721068, now seen corresponding path program 1 times [2024-09-24 23:41:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:41:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263825225] [2024-09-24 23:41:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:41:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:41:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934611588] [2024-09-24 23:41:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:41:55,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:41:55,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:41:55,513 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) [2024-09-24 23:41:55,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:41:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:41:55,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-24 23:41:55,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:41:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:41:55,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:42:12,318 WARN L876 $PredicateComparison]: unable to prove that (forall ((main_~z~0 Int)) (or (= (mod (+ (* main_~z~0 main_~z~0 c_main_~x~0) main_~z~0 (* 18446744073709551615 main_~z~0 main_~z~0 c_main_~y~0) (* 18446744073709551615 main_~z~0 c_main_~x~0)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 main_~z~0 c_main_~y~0) (* 18446744073709551615 c_main_~x~0) (* main_~z~0 c_main_~x~0) 1) 18446744073709551616) 0)))) is different from true [2024-09-24 23:42:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:42:12,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263825225] [2024-09-24 23:42:12,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:42:12,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934611588] [2024-09-24 23:42:12,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934611588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:42:12,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:42:12,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-24 23:42:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192871506] [2024-09-24 23:42:12,320 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:42:12,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 23:42:12,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:42:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 23:42:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=85, Unknown=2, NotChecked=18, Total=132 [2024-09-24 23:42:12,322 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:42:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:42:12,388 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-09-24 23:42:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:42:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-24 23:42:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:42:12,389 INFO L225 Difference]: With dead ends: 35 [2024-09-24 23:42:12,389 INFO L226 Difference]: Without dead ends: 32 [2024-09-24 23:42:12,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=34, Invalid=100, Unknown=2, NotChecked=20, Total=156 [2024-09-24 23:42:12,390 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:42:12,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:42:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-24 23:42:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-24 23:42:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:42:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-09-24 23:42:12,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2024-09-24 23:42:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:42:12,396 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-09-24 23:42:12,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:42:12,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:42:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-09-24 23:42:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 23:42:12,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:42:12,397 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:42:12,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:42:12,597 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 [2024-09-24 23:42:12,598 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:42:12,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:42:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1597780463, now seen corresponding path program 2 times [2024-09-24 23:42:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:42:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453057847] [2024-09-24 23:42:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:42:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:42:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:42:12,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069815004] [2024-09-24 23:42:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:42:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:42:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:42:12,630 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) [2024-09-24 23:42:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:42:12,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:42:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:42:12,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 23:42:12,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:42:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:42:12,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:42:29,330 WARN L876 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 18446744073709551615 c_main_~y~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0) (* 18446744073709551615 c_main_~x~0) 1) 18446744073709551616) 0)) (= (mod (+ (* c_main_~x~0 c_main_~z~0 c_main_~z~0) (* 18446744073709551615 c_main_~y~0 c_main_~z~0 c_main_~z~0) (* 18446744073709551615 c_main_~x~0 c_main_~z~0) c_main_~z~0) 18446744073709551616) 0)) is different from true [2024-09-24 23:42:37,490 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:43:01,757 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~z~0 Int)) (or (= (mod (+ (* 18446744073709551615 main_~z~0 main_~z~0 c_main_~x~0) (* main_~z~0 main_~z~0 main_~z~0 c_main_~x~0) (* main_~z~0 main_~z~0) (* 18446744073709551615 main_~z~0 main_~z~0 main_~z~0 c_main_~y~0)) 18446744073709551616) 0) (not (= (mod (+ (* main_~z~0 main_~z~0 c_main_~x~0) main_~z~0 (* 18446744073709551615 main_~z~0 main_~z~0 c_main_~y~0) (* 18446744073709551615 main_~z~0 c_main_~x~0)) 18446744073709551616) 0)))) is different from false [2024-09-24 23:43:05,761 WARN L876 $PredicateComparison]: unable to prove that (forall ((main_~z~0 Int)) (or (= (mod (+ (* 18446744073709551615 main_~z~0 main_~z~0 c_main_~x~0) (* main_~z~0 main_~z~0 main_~z~0 c_main_~x~0) (* main_~z~0 main_~z~0) (* 18446744073709551615 main_~z~0 main_~z~0 main_~z~0 c_main_~y~0)) 18446744073709551616) 0) (not (= (mod (+ (* main_~z~0 main_~z~0 c_main_~x~0) main_~z~0 (* 18446744073709551615 main_~z~0 main_~z~0 c_main_~y~0) (* 18446744073709551615 main_~z~0 c_main_~x~0)) 18446744073709551616) 0)))) is different from true [2024-09-24 23:43:14,892 WARN L293 SmtUtils]: Spent 5.11s 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) [2024-09-24 23:43:14,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:43:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453057847] [2024-09-24 23:43:14,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:43:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069815004] [2024-09-24 23:43:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069815004] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:43:14,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:43:14,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-24 23:43:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834299352] [2024-09-24 23:43:14,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:43:14,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:43:14,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:43:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:43:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=122, Unknown=4, NotChecked=46, Total=210 [2024-09-24 23:43:14,895 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:43:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:43:14,998 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2024-09-24 23:43:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:43:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2024-09-24 23:43:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:43:15,000 INFO L225 Difference]: With dead ends: 43 [2024-09-24 23:43:15,001 INFO L226 Difference]: Without dead ends: 40 [2024-09-24 23:43:15,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=46, Invalid=140, Unknown=4, NotChecked=50, Total=240 [2024-09-24 23:43:15,002 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:43:15,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:43:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-24 23:43:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-24 23:43:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:43:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-09-24 23:43:15,012 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 27 [2024-09-24 23:43:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:43:15,012 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-09-24 23:43:15,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:43:15,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:43:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-09-24 23:43:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:43:15,013 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:43:15,014 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:43:15,020 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:43:15,214 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 [2024-09-24 23:43:15,214 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:43:15,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:43:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash -746820590, now seen corresponding path program 3 times [2024-09-24 23:43:15,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:43:15,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692397422] [2024-09-24 23:43:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:43:15,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:43:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:43:15,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:43:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:43:15,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-24 23:43:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:43:15,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:43:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:43:15,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:43:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:43:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:43:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:43:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692397422] [2024-09-24 23:43:15,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692397422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:43:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512345147] [2024-09-24 23:43:15,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:43:15,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:43:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:43:15,377 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) [2024-09-24 23:43:15,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process