./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:00:14,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:00:14,168 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:00:14,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:00:14,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:00:14,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:00:14,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:00:14,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:00:14,208 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:00:14,208 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:00:14,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:00:14,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:00:14,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:00:14,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:00:14,210 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:00:14,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:00:14,211 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:00:14,211 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:00:14,214 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:00:14,214 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:00:14,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:00:14,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:00:14,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:00:14,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:00:14,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:00:14,218 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:00:14,218 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:00:14,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:00:14,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:00:14,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:00:14,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:00:14,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:00:14,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:00:14,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:00:14,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:00:14,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:00:14,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:00:14,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:00:14,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:00:14,223 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:00:14,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:00:14,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:00:14,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:00:14,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:00:14,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:00:14,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:00:14,508 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:00:14,508 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:00:14,509 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-25 00:00:16,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:00:16,246 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:00:16,247 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-25 00:00:16,262 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/055a800f6/b137a01be0f6488ba4cf70aa29b7871b/FLAGbff9e2047 [2024-09-25 00:00:16,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/055a800f6/b137a01be0f6488ba4cf70aa29b7871b [2024-09-25 00:00:16,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:00:16,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:00:16,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:00:16,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:00:16,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:00:16,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16230d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16, skipping insertion in model container [2024-09-25 00:00:16,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,319 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:00:16,516 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_valuebound20.c[537,550] [2024-09-25 00:00:16,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:00:16,566 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:00:16,579 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_valuebound20.c[537,550] [2024-09-25 00:00:16,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:00:16,605 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:00:16,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16 WrapperNode [2024-09-25 00:00:16,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:00:16,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:00:16,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:00:16,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:00:16,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,619 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,624 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:00:16,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:00:16,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:00:16,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:00:16,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:00:16,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,637 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,650 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]. [2024-09-25 00:00:16,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,657 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:00:16,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:00:16,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:00:16,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:00:16,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (1/1) ... [2024-09-25 00:00:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:00:16,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:16,698 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) [2024-09-25 00:00:16,705 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 [2024-09-25 00:00:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:00:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 00:00:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 00:00:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:00:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:00:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:00:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:00:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:00:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:00:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:00:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:00:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:00:16,822 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:00:16,824 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:00:16,981 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 00:00:16,981 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:00:16,999 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:00:16,999 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 00:00:17,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:00:16 BoogieIcfgContainer [2024-09-25 00:00:17,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:00:17,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:00:17,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:00:17,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:00:17,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:00:16" (1/3) ... [2024-09-25 00:00:17,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79227cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:00:17, skipping insertion in model container [2024-09-25 00:00:17,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:00:16" (2/3) ... [2024-09-25 00:00:17,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79227cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:00:17, skipping insertion in model container [2024-09-25 00:00:17,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:00:16" (3/3) ... [2024-09-25 00:00:17,011 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2024-09-25 00:00:17,026 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:00:17,026 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:00:17,082 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:00:17,093 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;@47fce9f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:00:17,094 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:00:17,098 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) [2024-09-25 00:00:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 00:00:17,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:17,110 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] [2024-09-25 00:00:17,111 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:17,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-25 00:00:17,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249980775] [2024-09-25 00:00:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:00:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:00:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:00:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 00:00:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:00:17,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:17,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249980775] [2024-09-25 00:00:17,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249980775] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:00:17,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:00:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 00:00:17,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432590337] [2024-09-25 00:00:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:00:17,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 00:00:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 00:00:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 00:00:17,374 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) [2024-09-25 00:00:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:17,415 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-25 00:00:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 00:00:17,418 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 [2024-09-25 00:00:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:17,427 INFO L225 Difference]: With dead ends: 54 [2024-09-25 00:00:17,427 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 00:00:17,431 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 [2024-09-25 00:00:17,434 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 [2024-09-25 00:00:17,434 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] [2024-09-25 00:00:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 00:00:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-25 00:00:17,472 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) [2024-09-25 00:00:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-25 00:00:17,476 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-25 00:00:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:17,477 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-25 00:00:17,478 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) [2024-09-25 00:00:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-25 00:00:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 00:00:17,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:17,484 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] [2024-09-25 00:00:17,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:00:17,485 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:17,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:17,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-25 00:00:17,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:17,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449660013] [2024-09-25 00:00:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:17,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:17,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188859253] [2024-09-25 00:00:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:17,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:17,532 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) [2024-09-25 00:00:17,536 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:00:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:17,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 00:00:17,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:00:17,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:00:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449660013] [2024-09-25 00:00:18,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188859253] [2024-09-25 00:00:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188859253] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:00:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:00:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-25 00:00:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362871620] [2024-09-25 00:00:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:00:18,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 00:00:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 00:00:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:00:18,042 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) [2024-09-25 00:00:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:18,161 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-25 00:00:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 00:00:18,162 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 [2024-09-25 00:00:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:18,163 INFO L225 Difference]: With dead ends: 37 [2024-09-25 00:00:18,164 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 00:00:18,164 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 [2024-09-25 00:00:18,166 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 [2024-09-25 00:00:18,166 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] [2024-09-25 00:00:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 00:00:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-25 00:00:18,179 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) [2024-09-25 00:00:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-25 00:00:18,182 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-25 00:00:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:18,184 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-25 00:00:18,185 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) [2024-09-25 00:00:18,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-25 00:00:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 00:00:18,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:18,188 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] [2024-09-25 00:00:18,208 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:00:18,389 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 [2024-09-25 00:00:18,390 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:18,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-25 00:00:18,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:18,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582610794] [2024-09-25 00:00:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:00:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:00:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:00:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 00:00:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 00:00:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:00:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582610794] [2024-09-25 00:00:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582610794] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:00:18,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:00:18,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 00:00:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591743636] [2024-09-25 00:00:18,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:00:18,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 00:00:18,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:18,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 00:00:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-25 00:00:18,649 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) [2024-09-25 00:00:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:18,711 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-25 00:00:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 00:00:18,712 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 [2024-09-25 00:00:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:18,713 INFO L225 Difference]: With dead ends: 42 [2024-09-25 00:00:18,713 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 00:00:18,714 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 [2024-09-25 00:00:18,715 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:00:18,715 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:00:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 00:00:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-25 00:00:18,722 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) [2024-09-25 00:00:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-25 00:00:18,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-25 00:00:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:18,724 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-25 00:00:18,724 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) [2024-09-25 00:00:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-25 00:00:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:00:18,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:18,726 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] [2024-09-25 00:00:18,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 00:00:18,726 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:18,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:18,727 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-25 00:00:18,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:18,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564354595] [2024-09-25 00:00:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:18,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:18,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622923675] [2024-09-25 00:00:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:18,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:18,774 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) [2024-09-25 00:00:18,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:00:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:18,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 00:00:18,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:00:19,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:00:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564354595] [2024-09-25 00:00:21,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622923675] [2024-09-25 00:00:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622923675] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:00:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:00:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-25 00:00:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332087163] [2024-09-25 00:00:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:00:21,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 00:00:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 00:00:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:00:21,157 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) [2024-09-25 00:00:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:21,378 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-25 00:00:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:00:21,379 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 [2024-09-25 00:00:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:21,380 INFO L225 Difference]: With dead ends: 45 [2024-09-25 00:00:21,380 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 00:00:21,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:00:21,382 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 [2024-09-25 00:00:21,382 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] [2024-09-25 00:00:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 00:00:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-25 00:00:21,391 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) [2024-09-25 00:00:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-25 00:00:21,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-25 00:00:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:21,393 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-25 00:00:21,393 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) [2024-09-25 00:00:21,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-25 00:00:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:00:21,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:21,395 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] [2024-09-25 00:00:21,412 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:00:21,595 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 [2024-09-25 00:00:21,596 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-25 00:00:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947225932] [2024-09-25 00:00:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:21,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916241476] [2024-09-25 00:00:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:21,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:21,619 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) [2024-09-25 00:00:21,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:00:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:21,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 00:00:21,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:00:22,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:00:22,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947225932] [2024-09-25 00:00:22,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916241476] [2024-09-25 00:00:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916241476] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:00:22,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:00:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-25 00:00:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295815953] [2024-09-25 00:00:22,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:00:22,645 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:00:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:00:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:00:22,650 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) [2024-09-25 00:00:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:23,316 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-25 00:00:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:00:23,317 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 [2024-09-25 00:00:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:23,319 INFO L225 Difference]: With dead ends: 67 [2024-09-25 00:00:23,319 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:00:23,322 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 [2024-09-25 00:00:23,324 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:00:23,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:00:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:00:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-25 00:00:23,344 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) [2024-09-25 00:00:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-25 00:00:23,345 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-25 00:00:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:23,346 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-25 00:00:23,346 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) [2024-09-25 00:00:23,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-25 00:00:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 00:00:23,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:23,349 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] [2024-09-25 00:00:23,366 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 00:00:23,550 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 [2024-09-25 00:00:23,551 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:23,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-25 00:00:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123590854] [2024-09-25 00:00:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:23,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:23,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434043488] [2024-09-25 00:00:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:23,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:23,582 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) [2024-09-25 00:00:23,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:00:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:23,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 00:00:23,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:00:23,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:00:23,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:23,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123590854] [2024-09-25 00:00:23,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:23,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434043488] [2024-09-25 00:00:23,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434043488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:00:23,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:00:23,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-25 00:00:23,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271333853] [2024-09-25 00:00:23,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:00:23,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 00:00:23,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 00:00:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:00:23,770 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) [2024-09-25 00:00:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:23,859 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-25 00:00:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:00:23,859 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 [2024-09-25 00:00:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:23,860 INFO L225 Difference]: With dead ends: 67 [2024-09-25 00:00:23,860 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:00:23,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:00:23,861 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 [2024-09-25 00:00:23,862 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] [2024-09-25 00:00:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:00:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-25 00:00:23,886 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) [2024-09-25 00:00:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-25 00:00:23,889 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-25 00:00:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:23,890 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-25 00:00:23,890 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) [2024-09-25 00:00:23,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-25 00:00:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-25 00:00:23,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:23,891 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] [2024-09-25 00:00:23,909 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:00:24,093 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 [2024-09-25 00:00:24,093 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:24,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-25 00:00:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:24,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722582200] [2024-09-25 00:00:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277485032] [2024-09-25 00:00:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:24,133 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) [2024-09-25 00:00:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:00:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:00:24,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-25 00:00:24,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 00:00:24,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 00:00:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722582200] [2024-09-25 00:00:32,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277485032] [2024-09-25 00:00:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277485032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:00:32,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:00:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-25 00:00:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140131452] [2024-09-25 00:00:32,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:00:32,130 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:00:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:00:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-25 00:00:32,131 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) [2024-09-25 00:00:36,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-25 00:00:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:00:39,170 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-25 00:00:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:00:39,171 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 [2024-09-25 00:00:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:00:39,172 INFO L225 Difference]: With dead ends: 90 [2024-09-25 00:00:39,172 INFO L226 Difference]: Without dead ends: 88 [2024-09-25 00:00:39,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:00:39,173 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:00:39,173 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-25 00:00:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-25 00:00:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-25 00:00:39,194 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) [2024-09-25 00:00:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-25 00:00:39,195 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-25 00:00:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:00:39,196 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-25 00:00:39,196 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) [2024-09-25 00:00:39,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-25 00:00:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 00:00:39,197 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:00:39,197 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] [2024-09-25 00:00:39,213 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 00:00:39,399 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 [2024-09-25 00:00:39,399 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:00:39,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:00:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-25 00:00:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:00:39,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461343747] [2024-09-25 00:00:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:00:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:00:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:00:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502540256] [2024-09-25 00:00:39,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:00:39,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:00:39,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:00:39,463 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) [2024-09-25 00:00:39,464 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:00:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:00:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:00:39,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-25 00:00:39,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:00:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 00:00:40,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:00:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-25 00:00:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:00:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461343747] [2024-09-25 00:00:51,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:00:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502540256] [2024-09-25 00:00:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502540256] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:00:51,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:00:51,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 31 [2024-09-25 00:00:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063636333] [2024-09-25 00:00:51,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:00:51,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 00:00:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:00:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 00:00:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:00:51,235 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:01:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:01:04,779 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2024-09-25 00:01:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 00:01:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 63 [2024-09-25 00:01:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:01:04,781 INFO L225 Difference]: With dead ends: 123 [2024-09-25 00:01:04,781 INFO L226 Difference]: Without dead ends: 96 [2024-09-25 00:01:04,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 00:01:04,783 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:01:04,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 284 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 521 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2024-09-25 00:01:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-25 00:01:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-09-25 00:01:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.144927536231884) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 00:01:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-09-25 00:01:04,819 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 63 [2024-09-25 00:01:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:01:04,821 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-09-25 00:01:04,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 27 states have internal predecessors, (54), 10 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:01:04,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:01:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-09-25 00:01:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 00:01:04,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:01:04,823 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:01:04,845 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 00:01:05,024 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 [2024-09-25 00:01:05,024 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:01:05,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:01:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 988892572, now seen corresponding path program 3 times [2024-09-25 00:01:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:01:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042366735] [2024-09-25 00:01:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:01:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:01:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:01:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:01:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:01:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 00:01:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 00:01:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 00:01:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 00:01:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 00:01:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 00:01:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:01:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 69 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-25 00:01:06,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:01:06,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042366735] [2024-09-25 00:01:06,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042366735] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:01:06,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324870333] [2024-09-25 00:01:06,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:01:06,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:01:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:01:06,200 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) [2024-09-25 00:01:06,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:01:06,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-25 00:01:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:01:06,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-25 00:01:06,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:01:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-25 00:01:08,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:01:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-25 00:01:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324870333] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:01:15,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:01:15,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 15] total 42 [2024-09-25 00:01:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192199713] [2024-09-25 00:01:15,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:01:15,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 00:01:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:01:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 00:01:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:01:15,977 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-25 00:01:42,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-25 00:01:46,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-25 00:02:10,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-25 00:02:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:02:17,998 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2024-09-25 00:02:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-25 00:02:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) Word has length 72 [2024-09-25 00:02:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:02:18,002 INFO L225 Difference]: With dead ends: 215 [2024-09-25 00:02:18,002 INFO L226 Difference]: Without dead ends: 110 [2024-09-25 00:02:18,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=1558, Invalid=6995, Unknown=3, NotChecked=0, Total=8556 [2024-09-25 00:02:18,007 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:02:18,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 516 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 869 Invalid, 3 Unknown, 0 Unchecked, 17.0s Time] [2024-09-25 00:02:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-25 00:02:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-09-25 00:02:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 79 states have internal predecessors, (79), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 00:02:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2024-09-25 00:02:18,087 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 72 [2024-09-25 00:02:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:02:18,087 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2024-09-25 00:02:18,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 37 states have internal predecessors, (86), 19 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-25 00:02:18,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:02:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2024-09-25 00:02:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 00:02:18,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:02:18,091 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:02:18,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:02:18,291 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 [2024-09-25 00:02:18,291 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:02:18,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:02:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1255090726, now seen corresponding path program 2 times [2024-09-25 00:02:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:02:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752349744] [2024-09-25 00:02:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:02:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:02:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:02:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:02:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:02:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 00:02:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 00:02:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 00:02:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 00:02:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 00:02:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 00:02:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:02:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-25 00:02:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:02:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752349744] [2024-09-25 00:02:19,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752349744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:02:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154901876] [2024-09-25 00:02:19,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:02:19,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:02:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:02:19,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:02:19,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:02:19,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:02:19,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:02:19,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 00:02:19,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:02:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-25 00:02:19,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:02:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-25 00:02:21,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154901876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:02:21,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:02:21,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2024-09-25 00:02:21,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961347379] [2024-09-25 00:02:21,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:02:21,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 00:02:21,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:02:21,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 00:02:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:02:21,203 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2024-09-25 00:02:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:02:21,781 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-09-25 00:02:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:02:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) Word has length 72 [2024-09-25 00:02:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:02:21,782 INFO L225 Difference]: With dead ends: 111 [2024-09-25 00:02:21,782 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 00:02:21,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 00:02:21,784 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:02:21,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 151 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:02:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 00:02:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 00:02:21,785 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) [2024-09-25 00:02:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 00:02:21,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2024-09-25 00:02:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:02:21,785 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 00:02:21,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 20 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2024-09-25 00:02:21,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:02:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 00:02:21,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 00:02:21,788 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 00:02:21,801 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 00:02:21,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:02:21,992 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2024-09-25 00:02:21,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 00:02:36,961 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-25 00:02:36,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:02:36 BoogieIcfgContainer [2024-09-25 00:02:36,986 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-25 00:02:36,987 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-25 00:02:36,987 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-25 00:02:36,987 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-25 00:02:36,988 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:00:16" (3/4) ... [2024-09-25 00:02:36,989 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-25 00:02:37,039 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-25 00:02:37,039 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-25 00:02:37,040 INFO L158 Benchmark]: Toolchain (without parser) took 140755.06ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 95.2MB in the beginning and 54.3MB in the end (delta: 41.0MB). Peak memory consumption was 92.2MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,040 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 94.4MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 00:02:37,040 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.25ms. Allocated memory is still 151.0MB. Free memory was 94.8MB in the beginning and 120.0MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,041 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.00ms. Allocated memory is still 151.0MB. Free memory was 120.0MB in the beginning and 118.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,041 INFO L158 Benchmark]: Boogie Preprocessor took 33.99ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 117.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,041 INFO L158 Benchmark]: RCFGBuilder took 339.42ms. Allocated memory is still 151.0MB. Free memory was 117.2MB in the beginning and 104.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,042 INFO L158 Benchmark]: TraceAbstraction took 139983.68ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 104.0MB in the beginning and 56.4MB in the end (delta: 47.6MB). Peak memory consumption was 109.8MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,042 INFO L158 Benchmark]: Witness Printer took 52.31ms. Allocated memory is still 203.4MB. Free memory was 56.4MB in the beginning and 54.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 00:02:37,045 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 94.4MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.25ms. Allocated memory is still 151.0MB. Free memory was 94.8MB in the beginning and 120.0MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.00ms. Allocated memory is still 151.0MB. Free memory was 120.0MB in the beginning and 118.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.99ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 117.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.42ms. Allocated memory is still 151.0MB. Free memory was 117.2MB in the beginning and 104.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 139983.68ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 104.0MB in the beginning and 56.4MB in the end (delta: 47.6MB). Peak memory consumption was 109.8MB. Max. memory is 16.1GB. * Witness Printer took 52.31ms. Allocated memory is still 203.4MB. Free memory was 56.4MB in the beginning and 54.3MB 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: 124.9s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 84.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 28.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 322 mSDsluCounter, 1739 SdHoareTripleChecker+Invalid, 28.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1494 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2257 IncrementalHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 245 mSDtfsCounter, 2257 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 690 SyntacticMatches, 24 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 75.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=9, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 846 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 970 ConstructedInterpolants, 14 QuantifiedInterpolants, 10048 SizeOfPredicates, 14 NumberOfNonLiveVariables, 929 ConjunctsInSsa, 231 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 875/1114 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: (((((((((((0 <= y) && ((z + ((__int128) y * x)) == ((long long) b * a))) && (a <= 20)) && (y <= 4)) && (b <= 20)) && (0 <= a)) && (1 <= b)) || (((((((z == 0) && (a <= 20)) && (b == y)) && (0 <= a)) && (y <= 20)) && (1 <= y)) && (a == x))) || ((((((((z == 0) && (y == (b / 2))) && (a <= 20)) && (b <= 20)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y))) || ((((((((z == 0) && (((__int128) y * x) == ((long long) b * a))) && (a <= 20)) && (b <= 20)) && (0 <= a)) && (1 <= b)) && (1 <= y)) && (y <= 5))) || ((((((((1 <= (b % 2)) && (a <= 20)) && (b <= 20)) && (((long long) a * 2) == x)) && (0 <= a)) && (x == ((__int128) z * 2))) && (1 <= b)) && ((((long long) -1 + b) / 2) == y))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-09-25 00:02:37,259 WARN L435 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-09-25 00:02:37,301 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE