./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.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 ca4ee3dd 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/ps4-ll_valuebound5.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 b2a54f54b02d2bb65a6f46eeae11edba1907f4f082d2aaa313102e422e7e6122 --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-ca4ee3d-m [2024-09-20 19:43:57,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:43:57,172 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:43:57,177 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:43:57,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:43:57,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:43:57,221 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:43:57,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:43:57,222 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:43:57,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:43:57,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:43:57,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:43:57,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:43:57,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:43:57,237 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:43:57,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:43:57,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:43:57,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:43:57,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:43:57,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:43:57,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:43:57,242 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:43:57,242 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:43:57,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:43:57,243 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:43:57,243 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:43:57,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:43:57,243 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:43:57,244 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:43:57,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:43:57,244 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:43:57,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:43:57,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:43:57,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:43:57,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:43:57,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:43:57,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:43:57,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:43:57,245 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:43:57,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:43:57,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:43:57,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:43:57,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2a54f54b02d2bb65a6f46eeae11edba1907f4f082d2aaa313102e422e7e6122 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:43:57,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:43:57,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:43:57,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:43:57,525 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:43:57,526 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:43:57,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2024-09-20 19:43:58,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:43:59,118 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:43:59,118 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2024-09-20 19:43:59,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b0816512f/89cff8fee9b141da91eee94026543074/FLAGce3b889a0 [2024-09-20 19:43:59,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b0816512f/89cff8fee9b141da91eee94026543074 [2024-09-20 19:43:59,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:43:59,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:43:59,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:43:59,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:43:59,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:43:59,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50031abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59, skipping insertion in model container [2024-09-20 19:43:59,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,169 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:43:59,305 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/ps4-ll_valuebound5.c[458,471] [2024-09-20 19:43:59,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:43:59,325 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:43:59,340 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/ps4-ll_valuebound5.c[458,471] [2024-09-20 19:43:59,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:43:59,364 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:43:59,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59 WrapperNode [2024-09-20 19:43:59,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:43:59,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:43:59,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:43:59,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:43:59,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,386 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,392 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:43:59,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:43:59,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:43:59,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:43:59,393 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:43:59,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,403 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,415 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]. [2024-09-20 19:43:59,416 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,416 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:43:59,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:43:59,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:43:59,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:43:59,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (1/1) ... [2024-09-20 19:43:59,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:43:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:43:59,454 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) [2024-09-20 19:43:59,455 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 [2024-09-20 19:43:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:43:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:43:59,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:43:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:43:59,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:43:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:43:59,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:43:59,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:43:59,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:43:59,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:43:59,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:43:59,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:43:59,547 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:43:59,550 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:43:59,715 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:43:59,715 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:43:59,738 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:43:59,738 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:43:59,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:43:59 BoogieIcfgContainer [2024-09-20 19:43:59,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:43:59,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:43:59,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:43:59,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:43:59,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:43:59" (1/3) ... [2024-09-20 19:43:59,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cee5f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:43:59, skipping insertion in model container [2024-09-20 19:43:59,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:43:59" (2/3) ... [2024-09-20 19:43:59,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cee5f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:43:59, skipping insertion in model container [2024-09-20 19:43:59,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:43:59" (3/3) ... [2024-09-20 19:43:59,745 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.c [2024-09-20 19:43:59,758 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:43:59,758 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:43:59,804 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:43:59,810 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;@705300b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:43:59,810 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:43:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:43:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 19:43:59,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:43:59,819 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:43:59,820 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:43:59,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:43:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1238311395, now seen corresponding path program 1 times [2024-09-20 19:43:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:43:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643944188] [2024-09-20 19:43:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:43:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:43:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:59,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:43:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:43:59,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:43:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:44:00,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:00,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643944188] [2024-09-20 19:44:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643944188] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:44:00,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:44:00,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:44:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140552037] [2024-09-20 19:44:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:00,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:44:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:44:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:44:00,046 INFO L87 Difference]: Start difference. First operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:44:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:00,069 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-09-20 19:44:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:44:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 19:44:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:00,076 INFO L225 Difference]: With dead ends: 44 [2024-09-20 19:44:00,076 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 19:44:00,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:44:00,082 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:00,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 19:44:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-20 19:44:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 19:44:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-09-20 19:44:00,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2024-09-20 19:44:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:00,112 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-09-20 19:44:00,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:44:00,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-09-20 19:44:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 19:44:00,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:00,114 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:00,114 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:44:00,114 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:00,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1910922015, now seen corresponding path program 1 times [2024-09-20 19:44:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221855231] [2024-09-20 19:44:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962818722] [2024-09-20 19:44:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:00,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:00,147 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) [2024-09-20 19:44:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:44:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:00,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:44:00,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:44:00,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:44:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:00,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221855231] [2024-09-20 19:44:00,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962818722] [2024-09-20 19:44:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962818722] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:44:00,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:44:00,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:44:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079896957] [2024-09-20 19:44:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:00,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:44:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:44:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:44:00,308 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:44:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:00,372 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-09-20 19:44:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:44:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 19:44:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:00,374 INFO L225 Difference]: With dead ends: 33 [2024-09-20 19:44:00,374 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 19:44:00,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:44:00,376 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:00,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 19:44:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-20 19:44:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:44:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-09-20 19:44:00,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 16 [2024-09-20 19:44:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:00,389 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-09-20 19:44:00,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:44:00,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-09-20 19:44:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 19:44:00,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:00,391 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:00,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:44:00,595 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:00,596 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:00,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 306700420, now seen corresponding path program 1 times [2024-09-20 19:44:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:00,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682889826] [2024-09-20 19:44:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:00,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657005134] [2024-09-20 19:44:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:00,638 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) [2024-09-20 19:44:00,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:44:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:00,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:44:00,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:44:00,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:44:00,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:00,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682889826] [2024-09-20 19:44:00,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:00,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657005134] [2024-09-20 19:44:00,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657005134] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:44:00,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:44:00,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 19:44:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526145525] [2024-09-20 19:44:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:44:00,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:44:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:44:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:44:00,845 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:44:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:00,887 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2024-09-20 19:44:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:44:00,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-20 19:44:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:00,889 INFO L225 Difference]: With dead ends: 35 [2024-09-20 19:44:00,889 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:44:00,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:44:00,890 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:00,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:44:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:44:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:44:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 19:44:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2024-09-20 19:44:00,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2024-09-20 19:44:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:00,901 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2024-09-20 19:44:00,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:44:00,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2024-09-20 19:44:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 19:44:00,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:00,903 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:00,919 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:44:01,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:01,104 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:01,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash 749725687, now seen corresponding path program 1 times [2024-09-20 19:44:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430129456] [2024-09-20 19:44:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:01,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108658110] [2024-09-20 19:44:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:01,138 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) [2024-09-20 19:44:01,140 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:44:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:44:01,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:44:01,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:44:01,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:44:01,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430129456] [2024-09-20 19:44:01,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108658110] [2024-09-20 19:44:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108658110] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:44:01,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:44:01,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-20 19:44:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913051667] [2024-09-20 19:44:01,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:44:01,418 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:44:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:44:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:44:01,420 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:44:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:44:01,531 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-20 19:44:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:44:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2024-09-20 19:44:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:44:01,534 INFO L225 Difference]: With dead ends: 45 [2024-09-20 19:44:01,534 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 19:44:01,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:44:01,536 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:44:01,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:44:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 19:44:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 19:44:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:44:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-09-20 19:44:01,553 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 29 [2024-09-20 19:44:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:44:01,553 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-09-20 19:44:01,554 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:44:01,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-09-20 19:44:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:44:01,555 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:44:01,556 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:44:01,572 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:44:01,757 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:01,757 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:44:01,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:44:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash 608187154, now seen corresponding path program 2 times [2024-09-20 19:44:01,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:44:01,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41428949] [2024-09-20 19:44:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:44:01,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:44:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:44:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340416862] [2024-09-20 19:44:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:44:01,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:44:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:44:01,798 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) [2024-09-20 19:44:01,799 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:44:01,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:44:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:44:01,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 19:44:01,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:44:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 19:44:02,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:44:10,393 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ c_main_~y~0 (* c_main_~y~0 c_main_~y~0)) (+ c_main_~c~0 (* c_main_~c~0 c_main_~y~0)))) is different from false [2024-09-20 19:44:22,459 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) (+ (* 2 c_main_~c~0) (* c_main_~c~0 c_main_~y~0)))) is different from false [2024-09-20 19:44:38,520 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ (* 3 c_main_~c~0) (* c_main_~c~0 c_main_~y~0)) (+ (* 3 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)))) is different from false [2024-09-20 19:44:54,575 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ (* c_main_~c~0 4) (* c_main_~c~0 c_main_~y~0)) (+ (* 4 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)))) is different from false [2024-09-20 19:44:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 27 not checked. [2024-09-20 19:44:54,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:44:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41428949] [2024-09-20 19:44:54,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:44:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340416862] [2024-09-20 19:44:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340416862] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:44:54,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:44:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-09-20 19:44:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548276551] [2024-09-20 19:44:54,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:44:54,701 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 19:44:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:44:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 19:44:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=389, Unknown=4, NotChecked=172, Total=650 [2024-09-20 19:44:54,704 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-20 19:44:59,147 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~c~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0))) (let ((.cse0 (not (= (* 4 c_main_~x~0) (+ (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 2) .cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))))) (.cse3 (= (+ c_main_~y~0 .cse2) (+ c_main_~c~0 .cse1))) (.cse4 (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)))) (and (or .cse0 (= (+ (* c_main_~c~0 4) .cse1) (+ (* 4 c_main_~y~0) .cse2))) (or .cse0 .cse3) (or (< c_main_~c~0 c_main_~k~0) (= (* c_main_~y~0 c_main_~k~0) .cse2)) (or .cse4 .cse3) (or .cse4 (= (+ (* 2 c_main_~y~0) .cse2) (+ (* 2 c_main_~c~0) .cse1))) (or .cse4 (= (+ (* 3 c_main_~c~0) .cse1) (+ (* 3 c_main_~y~0) .cse2)))))) is different from false [2024-09-20 19:46:49,381 WARN L293 SmtUtils]: Spent 24.05s on a formula simplification. DAG size of input: 51 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:48:43,565 WARN L293 SmtUtils]: Spent 26.31s on a formula simplification. DAG size of input: 52 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)