./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 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/geo2-ll_unwindbound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f6c2207c7fc8e707b9260ef6afb25be5d17e51cbd8001e46a4b7aba8375babe --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-27b4987-m [2024-09-21 12:02:05,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:02:05,143 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:02:05,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:02:05,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:02:05,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:02:05,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:02:05,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:02:05,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:02:05,164 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:02:05,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:02:05,164 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:02:05,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:02:05,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:02:05,165 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:02:05,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:02:05,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:02:05,166 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:02:05,166 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:02:05,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:02:05,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:02:05,167 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:02:05,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:02:05,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:02:05,168 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:02:05,168 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:02:05,168 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:02:05,169 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:02:05,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:02:05,169 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:02:05,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:02:05,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:02:05,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:02:05,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:02:05,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:02:05,170 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:02:05,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:02:05,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:02:05,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:02:05,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:02:05,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:02:05,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:02:05,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6c2207c7fc8e707b9260ef6afb25be5d17e51cbd8001e46a4b7aba8375babe Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:02:05,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:02:05,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:02:05,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:02:05,391 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:02:05,392 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:02:05,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c [2024-09-21 12:02:06,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:02:06,825 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:02:06,825 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c [2024-09-21 12:02:06,831 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/31fb5b9b8/096e2a592ffa42a5a0b89ed68ac2db7d/FLAG05b4b3faa [2024-09-21 12:02:06,842 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/31fb5b9b8/096e2a592ffa42a5a0b89ed68ac2db7d [2024-09-21 12:02:06,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:02:06,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:02:06,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:02:06,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:02:06,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:02:06,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:02:06" (1/1) ... [2024-09-21 12:02:06,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c7597e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:06, skipping insertion in model container [2024-09-21 12:02:06,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:02:06" (1/1) ... [2024-09-21 12:02:06,865 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:02:06,982 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_unwindbound100.c[525,538] [2024-09-21 12:02:06,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:02:07,003 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:02:07,015 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_unwindbound100.c[525,538] [2024-09-21 12:02:07,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:02:07,036 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:02:07,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07 WrapperNode [2024-09-21 12:02:07,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:02:07,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:02:07,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:02:07,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:02:07,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,055 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:02:07,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:02:07,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:02:07,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:02:07,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:02:07,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,067 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,074 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]. [2024-09-21 12:02:07,075 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:02:07,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:02:07,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:02:07,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:02:07,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (1/1) ... [2024-09-21 12:02:07,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:02:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:02:07,138 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) [2024-09-21 12:02:07,144 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 [2024-09-21 12:02:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:02:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:02:07,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:02:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:02:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:02:07,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:02:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:02:07,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:02:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:02:07,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:02:07,236 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:02:07,238 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:02:07,329 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 12:02:07,329 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:02:07,345 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:02:07,345 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:02:07,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:02:07 BoogieIcfgContainer [2024-09-21 12:02:07,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:02:07,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:02:07,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:02:07,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:02:07,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:02:06" (1/3) ... [2024-09-21 12:02:07,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dcd423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:02:07, skipping insertion in model container [2024-09-21 12:02:07,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:02:07" (2/3) ... [2024-09-21 12:02:07,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dcd423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:02:07, skipping insertion in model container [2024-09-21 12:02:07,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:02:07" (3/3) ... [2024-09-21 12:02:07,352 INFO L112 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound100.c [2024-09-21 12:02:07,363 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:02:07,363 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:02:07,401 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:02:07,406 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;@48b1390b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:02:07,407 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:02:07,410 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) [2024-09-21 12:02:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 12:02:07,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:07,415 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:07,415 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:07,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1030420147, now seen corresponding path program 1 times [2024-09-21 12:02:07,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:07,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152712498] [2024-09-21 12:02:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:07,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:07,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:02:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:02:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152712498] [2024-09-21 12:02:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152712498] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:02:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:02:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 12:02:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220892793] [2024-09-21 12:02:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:02:07,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 12:02:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:02:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 12:02:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:02:07,565 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) [2024-09-21 12:02:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:02:07,601 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-09-21 12:02:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 12:02:07,603 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 [2024-09-21 12:02:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:02:07,608 INFO L225 Difference]: With dead ends: 36 [2024-09-21 12:02:07,608 INFO L226 Difference]: Without dead ends: 17 [2024-09-21 12:02:07,610 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 [2024-09-21 12:02:07,613 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 [2024-09-21 12:02:07,613 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] [2024-09-21 12:02:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-21 12:02:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-09-21 12:02:07,639 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) [2024-09-21 12:02:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-21 12:02:07,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-21 12:02:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:02:07,641 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-21 12:02:07,641 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) [2024-09-21 12:02:07,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-21 12:02:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-21 12:02:07,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:07,642 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:07,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:02:07,643 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:07,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2015485711, now seen corresponding path program 1 times [2024-09-21 12:02:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:07,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694039230] [2024-09-21 12:02:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:07,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:02:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:02:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694039230] [2024-09-21 12:02:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694039230] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:02:07,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:02:07,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-21 12:02:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127739927] [2024-09-21 12:02:07,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:02:07,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:02:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:02:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:02:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:02:07,749 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) [2024-09-21 12:02:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:02:07,806 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-09-21 12:02:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 12:02:07,807 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 [2024-09-21 12:02:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:02:07,808 INFO L225 Difference]: With dead ends: 25 [2024-09-21 12:02:07,808 INFO L226 Difference]: Without dead ends: 18 [2024-09-21 12:02:07,808 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 [2024-09-21 12:02:07,809 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 [2024-09-21 12:02:07,810 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] [2024-09-21 12:02:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-21 12:02:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-21 12:02:07,815 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) [2024-09-21 12:02:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-09-21 12:02:07,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2024-09-21 12:02:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:02:07,816 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-09-21 12:02:07,816 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) [2024-09-21 12:02:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-09-21 12:02:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-21 12:02:07,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:07,817 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:07,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:02:07,818 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:07,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2017273171, now seen corresponding path program 1 times [2024-09-21 12:02:07,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:07,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452065161] [2024-09-21 12:02:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:07,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:02:07,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911888097] [2024-09-21 12:02:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:07,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:02:07,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:02:07,838 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) [2024-09-21 12:02:07,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:02:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:07,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 12:02:07,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:02:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:07,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:02:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:02:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452065161] [2024-09-21 12:02:07,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:02:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911888097] [2024-09-21 12:02:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911888097] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:02:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:02:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:02:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622036381] [2024-09-21 12:02:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:02:07,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:02:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:02:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:02:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:02:07,964 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) [2024-09-21 12:02:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:02:08,004 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-09-21 12:02:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:02:08,005 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 [2024-09-21 12:02:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:02:08,006 INFO L225 Difference]: With dead ends: 27 [2024-09-21 12:02:08,006 INFO L226 Difference]: Without dead ends: 24 [2024-09-21 12:02:08,007 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 [2024-09-21 12:02:08,036 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 [2024-09-21 12:02:08,036 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] [2024-09-21 12:02:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-21 12:02:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-21 12:02:08,050 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) [2024-09-21 12:02:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-09-21 12:02:08,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2024-09-21 12:02:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:02:08,054 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-09-21 12:02:08,054 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) [2024-09-21 12:02:08,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-09-21 12:02:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-21 12:02:08,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:08,057 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:08,073 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:02:08,257 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 [2024-09-21 12:02:08,259 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:08,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -810508528, now seen corresponding path program 1 times [2024-09-21 12:02:08,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761529813] [2024-09-21 12:02:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:08,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:02:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:08,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-21 12:02:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:08,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:02:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761529813] [2024-09-21 12:02:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761529813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:02:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251298680] [2024-09-21 12:02:08,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:08,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:02:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:02:08,441 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) [2024-09-21 12:02:08,451 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:02:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:08,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 12:02:08,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:02:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:08,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:02:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251298680] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:02:08,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:02:08,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-21 12:02:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979160970] [2024-09-21 12:02:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:02:08,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 12:02:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:02:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 12:02:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:02:08,571 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:02:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:02:08,683 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2024-09-21 12:02:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:02:08,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 19 [2024-09-21 12:02:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:02:08,684 INFO L225 Difference]: With dead ends: 55 [2024-09-21 12:02:08,684 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:02:08,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:02:08,685 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:02:08,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:02:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:02:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-09-21 12:02:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:02:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2024-09-21 12:02:08,695 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2024-09-21 12:02:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:02:08,695 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2024-09-21 12:02:08,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:02:08,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2024-09-21 12:02:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-21 12:02:08,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:08,696 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:08,709 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:02:08,900 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 [2024-09-21 12:02:08,901 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash -808721068, now seen corresponding path program 1 times [2024-09-21 12:02:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682457963] [2024-09-21 12:02:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:02:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281972843] [2024-09-21 12:02:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:08,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:02:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:02:08,925 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) [2024-09-21 12:02:08,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:02:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:02:08,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-21 12:02:08,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:02:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:02:09,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:02:25,393 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 [2024-09-21 12:02:25,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:02:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682457963] [2024-09-21 12:02:25,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:02:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281972843] [2024-09-21 12:02:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281972843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:02:25,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:02:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:02:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323739355] [2024-09-21 12:02:25,397 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:02:25,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:02:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:02:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:02:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=85, Unknown=2, NotChecked=18, Total=132 [2024-09-21 12:02:25,398 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2024-09-21 12:02:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:02:25,466 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-09-21 12:02:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:02:25,467 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 [2024-09-21 12:02:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:02:25,468 INFO L225 Difference]: With dead ends: 46 [2024-09-21 12:02:25,468 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 12:02:25,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=34, Invalid=100, Unknown=2, NotChecked=20, Total=156 [2024-09-21 12:02:25,469 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:02:25,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:02:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 12:02:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-21 12:02:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:02:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-21 12:02:25,476 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2024-09-21 12:02:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:02:25,476 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-21 12:02:25,476 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) [2024-09-21 12:02:25,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-21 12:02:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 12:02:25,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:02:25,477 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:02:25,489 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:02:25,681 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 [2024-09-21 12:02:25,682 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:02:25,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:02:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1595993003, now seen corresponding path program 2 times [2024-09-21 12:02:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:02:25,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675762839] [2024-09-21 12:02:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:02:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:02:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:02:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655084185] [2024-09-21 12:02:25,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:02:25,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:02:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:02:25,707 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) [2024-09-21 12:02:25,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:02:25,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:02:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:02:25,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-21 12:02:25,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:02:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:02:25,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:02:43,409 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 [2024-09-21 12:03:12,066 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 [2024-09-21 12:03:16,073 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 [2024-09-21 12:03:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:03:24,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675762839] [2024-09-21 12:03:24,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:03:24,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655084185] [2024-09-21 12:03:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655084185] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:03:24,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:03:24,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:03:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375449613] [2024-09-21 12:03:24,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:03:24,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:03:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:03:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:03:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=122, Unknown=4, NotChecked=46, Total=210 [2024-09-21 12:03:24,102 INFO L87 Difference]: Start difference. First operand 43 states and 47 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) [2024-09-21 12:03:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:03:24,183 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2024-09-21 12:03:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:03:24,183 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 [2024-09-21 12:03:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:03:24,184 INFO L225 Difference]: With dead ends: 45 [2024-09-21 12:03:24,184 INFO L226 Difference]: Without dead ends: 42 [2024-09-21 12:03:24,185 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=46, Invalid=140, Unknown=4, NotChecked=50, Total=240 [2024-09-21 12:03:24,185 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 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 [2024-09-21 12:03:24,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 109 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:03:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-21 12:03:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-21 12:03:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 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) [2024-09-21 12:03:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-09-21 12:03:24,192 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 27 [2024-09-21 12:03:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:03:24,192 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-09-21 12:03:24,192 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) [2024-09-21 12:03:24,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:03:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-09-21 12:03:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 12:03:24,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:03:24,194 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:03:24,203 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:03:24,397 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 [2024-09-21 12:03:24,398 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:03:24,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:03:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash -745033130, now seen corresponding path program 3 times [2024-09-21 12:03:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:03:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397059934] [2024-09-21 12:03:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:03:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:03:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:03:24,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775922748] [2024-09-21 12:03:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:03:24,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:03:24,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:03:24,453 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) [2024-09-21 12:03:24,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process