./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-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 de325976 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/prodbin-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 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a --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-de32597-m [2024-09-17 19:12:42,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:12:42,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:12:42,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:12:42,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:12:42,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:12:42,231 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:12:42,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:12:42,232 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:12:42,233 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:12:42,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:12:42,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:12:42,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:12:42,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:12:42,237 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:12:42,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:12:42,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:12:42,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:12:42,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:12:42,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:12:42,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:12:42,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:12:42,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:12:42,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:12:42,242 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:12:42,243 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:12:42,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:12:42,243 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:12:42,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:12:42,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:12:42,244 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:12:42,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:12:42,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:12:42,244 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:12:42,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:12:42,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:12:42,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:12:42,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:12:42,245 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:12:42,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:12:42,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:12:42,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:12:42,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:12:42,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:12:42,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:12:42,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:12:42,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:12:42,524 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:12:42,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-17 19:12:43,939 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:12:44,147 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:12:44,151 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-17 19:12:44,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b344ddaa4/6cf93dc77c224ced8c7bc6ef62a7b267/FLAG54cba1f46 [2024-09-17 19:12:44,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b344ddaa4/6cf93dc77c224ced8c7bc6ef62a7b267 [2024-09-17 19:12:44,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:12:44,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:12:44,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:12:44,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:12:44,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:12:44,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bea0abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44, skipping insertion in model container [2024-09-17 19:12:44,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:12:44,381 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/prodbin-ll_valuebound5.c[537,550] [2024-09-17 19:12:44,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:12:44,401 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:12:44,412 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/prodbin-ll_valuebound5.c[537,550] [2024-09-17 19:12:44,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:12:44,434 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:12:44,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44 WrapperNode [2024-09-17 19:12:44,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:12:44,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:12:44,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:12:44,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:12:44,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,456 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:12:44,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:12:44,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:12:44,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:12:44,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:12:44,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,491 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]. [2024-09-17 19:12:44,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:12:44,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:12:44,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:12:44,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:12:44,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (1/1) ... [2024-09-17 19:12:44,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:12:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:44,537 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) [2024-09-17 19:12:44,540 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 [2024-09-17 19:12:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:12:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 19:12:44,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 19:12:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:12:44,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:12:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:12:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:12:44,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:12:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:12:44,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:12:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 19:12:44,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 19:12:44,642 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:12:44,643 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:12:44,784 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-17 19:12:44,784 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:12:44,812 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:12:44,815 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-17 19:12:44,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:44 BoogieIcfgContainer [2024-09-17 19:12:44,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:12:44,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:12:44,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:12:44,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:12:44,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:12:44" (1/3) ... [2024-09-17 19:12:44,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:12:44, skipping insertion in model container [2024-09-17 19:12:44,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:44" (2/3) ... [2024-09-17 19:12:44,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:12:44, skipping insertion in model container [2024-09-17 19:12:44,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:44" (3/3) ... [2024-09-17 19:12:44,823 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2024-09-17 19:12:44,839 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:12:44,839 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:12:44,888 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:12:44,894 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;@1d1b7121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:12:44,894 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:12:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:12:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 19:12:44,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:44,914 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:44,917 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:44,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-17 19:12:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67349226] [2024-09-17 19:12:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:45,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:45,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67349226] [2024-09-17 19:12:45,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67349226] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:12:45,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:12:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:12:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584161700] [2024-09-17 19:12:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:45,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 19:12:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 19:12:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:12:45,155 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:12:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:45,177 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-17 19:12:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 19:12:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-17 19:12:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:45,186 INFO L225 Difference]: With dead ends: 54 [2024-09-17 19:12:45,186 INFO L226 Difference]: Without dead ends: 26 [2024-09-17 19:12:45,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:12:45,191 INFO L434 NwaCegarLoop]: 32 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, 32 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 [2024-09-17 19:12:45,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:12:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-17 19:12:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-17 19:12:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 19:12:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-17 19:12:45,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-17 19:12:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:45,236 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-17 19:12:45,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:12:45,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-17 19:12:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 19:12:45,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:45,239 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:45,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:12:45,242 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:45,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-17 19:12:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874334685] [2024-09-17 19:12:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:45,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:45,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565727757] [2024-09-17 19:12:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:45,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:45,319 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) [2024-09-17 19:12:45,321 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:12:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:45,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 19:12:45,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:45,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:45,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874334685] [2024-09-17 19:12:45,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565727757] [2024-09-17 19:12:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565727757] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:45,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:12:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-17 19:12:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549902249] [2024-09-17 19:12:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:45,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:12:45,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:12:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:12:45,796 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 19:12:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:45,905 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-17 19:12:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:12:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-17 19:12:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:45,909 INFO L225 Difference]: With dead ends: 37 [2024-09-17 19:12:45,909 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:12:45,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:45,911 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:45,912 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:12:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-17 19:12:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:12:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-17 19:12:45,922 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-17 19:12:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:45,923 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-17 19:12:45,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 19:12:45,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-17 19:12:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 19:12:45,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:45,925 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:45,938 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:12:46,129 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 [2024-09-17 19:12:46,130 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:46,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-17 19:12:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:46,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747102531] [2024-09-17 19:12:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:46,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:12:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747102531] [2024-09-17 19:12:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747102531] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:12:46,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:12:46,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 19:12:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063270692] [2024-09-17 19:12:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:46,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:12:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:12:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:12:46,411 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:46,484 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-17 19:12:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:12:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-17 19:12:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:46,485 INFO L225 Difference]: With dead ends: 42 [2024-09-17 19:12:46,485 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:12:46,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:12:46,488 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:46,489 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:12:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-17 19:12:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:12:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-17 19:12:46,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-17 19:12:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:46,498 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-17 19:12:46,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:46,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-17 19:12:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 19:12:46,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:46,501 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:46,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 19:12:46,501 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:46,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-17 19:12:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586438353] [2024-09-17 19:12:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:46,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811547734] [2024-09-17 19:12:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:46,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:46,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:46,548 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) [2024-09-17 19:12:46,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:12:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:46,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 19:12:46,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:46,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586438353] [2024-09-17 19:12:48,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:48,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811547734] [2024-09-17 19:12:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811547734] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:48,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:12:48,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-17 19:12:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382661886] [2024-09-17 19:12:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:48,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 19:12:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 19:12:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:48,826 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:49,005 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-17 19:12:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 19:12:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-17 19:12:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:49,009 INFO L225 Difference]: With dead ends: 45 [2024-09-17 19:12:49,009 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 19:12:49,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-17 19:12:49,010 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:49,011 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 19:12:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-17 19:12:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:12:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-17 19:12:49,023 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-17 19:12:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:49,024 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-17 19:12:49,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:49,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-17 19:12:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 19:12:49,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:49,026 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:49,043 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:12:49,226 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 [2024-09-17 19:12:49,227 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:49,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-17 19:12:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616547543] [2024-09-17 19:12:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711766264] [2024-09-17 19:12:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:49,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:49,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:49,267 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) [2024-09-17 19:12:49,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:12:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:49,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 19:12:49,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:49,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:50,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616547543] [2024-09-17 19:12:50,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:50,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711766264] [2024-09-17 19:12:50,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711766264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:50,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:50,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-17 19:12:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336794198] [2024-09-17 19:12:50,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:50,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:12:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:12:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:12:50,296 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 19:12:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:50,983 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-17 19:12:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:12:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-17 19:12:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:50,987 INFO L225 Difference]: With dead ends: 67 [2024-09-17 19:12:50,987 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:12:50,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:12:50,991 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:50,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:12:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:12:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-17 19:12:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 19:12:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-17 19:12:51,017 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-17 19:12:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:51,018 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-17 19:12:51,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 19:12:51,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-17 19:12:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-17 19:12:51,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:51,021 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:51,039 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:12:51,221 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 [2024-09-17 19:12:51,222 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:51,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-17 19:12:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764680411] [2024-09-17 19:12:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:51,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598225762] [2024-09-17 19:12:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:51,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:51,243 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) [2024-09-17 19:12:51,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:12:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 19:12:51,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:12:51,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:12:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764680411] [2024-09-17 19:12:51,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598225762] [2024-09-17 19:12:51,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598225762] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:51,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:51,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-17 19:12:51,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21659592] [2024-09-17 19:12:51,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:51,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 19:12:51,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:51,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 19:12:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:12:51,569 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 19:12:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:51,661 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-17 19:12:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 19:12:51,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-17 19:12:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:51,662 INFO L225 Difference]: With dead ends: 67 [2024-09-17 19:12:51,663 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:12:51,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:51,664 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:51,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:12:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-17 19:12:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 19:12:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-17 19:12:51,688 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-17 19:12:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:51,688 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-17 19:12:51,688 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 19:12:51,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-17 19:12:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 19:12:51,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:51,690 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:51,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:12:51,895 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 [2024-09-17 19:12:51,896 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:51,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-17 19:12:51,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:51,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024762960] [2024-09-17 19:12:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761355405] [2024-09-17 19:12:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:51,924 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) [2024-09-17 19:12:51,926 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:12:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 19:12:51,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:12:52,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:13:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:13:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:13:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024762960] [2024-09-17 19:13:02,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:13:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761355405] [2024-09-17 19:13:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761355405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:13:02,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:13:02,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-17 19:13:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899587264] [2024-09-17 19:13:02,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:13:02,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:13:02,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:13:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:13:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:13:02,025 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 19:13:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:13:09,931 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-17 19:13:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:13:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-17 19:13:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:13:09,933 INFO L225 Difference]: With dead ends: 90 [2024-09-17 19:13:09,933 INFO L226 Difference]: Without dead ends: 88 [2024-09-17 19:13:09,933 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:13:09,934 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:13:09,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-17 19:13:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-17 19:13:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-17 19:13:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 19:13:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-17 19:13:09,955 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-17 19:13:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:13:09,955 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-17 19:13:09,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 19:13:09,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:13:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-17 19:13:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 19:13:09,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:13:09,958 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:13:09,987 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:13:10,158 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 19:13:10,159 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:13:10,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:13:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-17 19:13:10,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:13:10,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305683349] [2024-09-17 19:13:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:13:10,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:13:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:13:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:13:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:13:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:13:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:13:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:13:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 19:13:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:13:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-17 19:13:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:13:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305683349] [2024-09-17 19:13:10,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305683349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:13:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779163317] [2024-09-17 19:13:10,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:13:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:13:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:13:10,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:13:10,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:13:10,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:13:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:13:10,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 19:13:10,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:13:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 19:13:11,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:13:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-17 19:13:11,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779163317] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:13:11,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:13:11,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-17 19:13:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737882302] [2024-09-17 19:13:11,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:13:11,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:13:11,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:13:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:13:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:13:11,244 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-17 19:13:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:13:11,495 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-09-17 19:13:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:13:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 63 [2024-09-17 19:13:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:13:11,497 INFO L225 Difference]: With dead ends: 115 [2024-09-17 19:13:11,497 INFO L226 Difference]: Without dead ends: 50 [2024-09-17 19:13:11,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:13:11,500 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:13:11,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 247 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:13:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-17 19:13:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-17 19:13:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:13:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-17 19:13:11,522 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 63 [2024-09-17 19:13:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:13:11,522 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-17 19:13:11,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-17 19:13:11,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:13:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-17 19:13:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 19:13:11,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:13:11,524 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:13:11,537 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:13:11,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:13:11,727 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:13:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:13:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash 499200656, now seen corresponding path program 2 times [2024-09-17 19:13:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:13:11,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386956339] [2024-09-17 19:13:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:13:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:13:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:13:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:13:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:13:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:13:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:13:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:13:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 19:13:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:13:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:13:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:13:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:13:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386956339] [2024-09-17 19:13:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386956339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:13:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259038630] [2024-09-17 19:13:12,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:13:12,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:13:12,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:13:12,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:13:12,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:13:12,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:13:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:13:12,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 19:13:12,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:13:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-17 19:13:12,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:13:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:13:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259038630] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:13:13,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:13:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2024-09-17 19:13:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114953641] [2024-09-17 19:13:13,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:13:13,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:13:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:13:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:13:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:13:13,635 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-17 19:13:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:13:13,863 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-17 19:13:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:13:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) Word has length 63 [2024-09-17 19:13:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:13:13,864 INFO L225 Difference]: With dead ends: 54 [2024-09-17 19:13:13,864 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:13:13,865 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:13:13,867 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:13:13,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:13:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:13:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:13:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:13:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:13:13,868 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-09-17 19:13:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:13:13,868 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:13:13,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-17 19:13:13,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:13:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:13:13,869 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:13:13,873 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 19:13:13,885 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 19:13:14,074 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:13:14,077 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-09-17 19:13:14,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 19:13:15,757 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:13:15,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:13:15 BoogieIcfgContainer [2024-09-17 19:13:15,779 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:13:15,781 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 19:13:15,781 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 19:13:15,781 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 19:13:15,782 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:44" (3/4) ... [2024-09-17 19:13:15,783 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 19:13:15,826 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 19:13:15,826 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 19:13:15,827 INFO L158 Benchmark]: Toolchain (without parser) took 31644.73ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 83.5MB in the beginning and 114.2MB in the end (delta: -30.7MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,827 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 71.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:13:15,827 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.28ms. Allocated memory is still 151.0MB. Free memory was 83.3MB in the beginning and 121.5MB in the end (delta: -38.2MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,828 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.02ms. Allocated memory is still 151.0MB. Free memory was 121.1MB in the beginning and 120.3MB in the end (delta: 778.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,828 INFO L158 Benchmark]: Boogie Preprocessor took 46.37ms. Allocated memory is still 151.0MB. Free memory was 120.3MB in the beginning and 118.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:13:15,828 INFO L158 Benchmark]: RCFGBuilder took 311.13ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 106.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,828 INFO L158 Benchmark]: TraceAbstraction took 30961.59ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 105.2MB in the beginning and 116.2MB in the end (delta: -11.0MB). Peak memory consumption was 91.5MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,828 INFO L158 Benchmark]: Witness Printer took 44.71ms. Allocated memory is still 182.5MB. Free memory was 116.2MB in the beginning and 114.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:13:15,830 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 71.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.28ms. Allocated memory is still 151.0MB. Free memory was 83.3MB in the beginning and 121.5MB in the end (delta: -38.2MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.02ms. Allocated memory is still 151.0MB. Free memory was 121.1MB in the beginning and 120.3MB in the end (delta: 778.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.37ms. Allocated memory is still 151.0MB. Free memory was 120.3MB in the beginning and 118.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 311.13ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 106.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 30961.59ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 105.2MB in the beginning and 116.2MB in the end (delta: -11.0MB). Peak memory consumption was 91.5MB. Max. memory is 16.1GB. * Witness Printer took 44.71ms. Allocated memory is still 182.5MB. Free memory was 116.2MB in the beginning and 114.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.2s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1272 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1065 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 999 IncrementalHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 207 mSDtfsCounter, 999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 579 SyntacticMatches, 18 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 684 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 792 ConstructedInterpolants, 1 QuantifiedInterpolants, 4429 SizeOfPredicates, 12 NumberOfNonLiveVariables, 769 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 646/710 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((z + ((__int128) y * x)) == ((long long) b * a)) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && (1 <= b)) && (a <= 5)) && ((((long long) -1 + b) / 2) == y)) || ((((((z == ((long long) b * a)) && (b <= 5)) && (0 <= a)) && (1 <= b)) && (y == 0)) && (a <= 5))) || (((((((z == 0) && (b == y)) && (0 <= a)) && (1 <= y)) && (a <= 5)) && (a == x)) && (y <= 5))) || ((((((y == 1) && (b <= 5)) && (((__int128) z + x) == ((long long) b * a))) && (0 <= a)) && (1 <= b)) && (a <= 5))) || ((((((((z == 0) && (y == (b / 2))) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y)) && (a <= 5))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-17 19:13:15,861 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE