./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 f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_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-f1d7dc9-m [2024-09-20 12:58:21,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:58:21,865 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:58:21,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:58:21,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:58:21,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:58:21,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:58:21,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:58:21,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:58:21,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:58:21,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:58:21,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:58:21,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:58:21,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:58:21,898 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:58:21,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:58:21,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:58:21,899 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:58:21,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:58:21,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:58:21,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:58:21,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:58:21,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:58:21,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:58:21,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:58:21,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:58:21,906 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:58:21,906 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:58:21,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:58:21,906 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:58:21,906 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:58:21,907 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:58:21,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:58:21,907 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:58:21,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:58:21,908 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:58:21,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:58:21,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:58:21,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:58:21,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:58:21,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:58:21,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:58:21,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:58:22,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:58:22,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:58:22,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:58:22,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:58:22,190 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:58:22,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-20 12:58:23,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:58:23,811 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:58:23,812 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2024-09-20 12:58:23,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6df1fcb2c/e298e034ce554407bbdf2a0239559c99/FLAG531ab2dc8 [2024-09-20 12:58:23,828 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6df1fcb2c/e298e034ce554407bbdf2a0239559c99 [2024-09-20 12:58:23,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:58:23,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:58:23,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:58:23,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:58:23,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:58:23,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:23" (1/1) ... [2024-09-20 12:58:23,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f51a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:23, skipping insertion in model container [2024-09-20 12:58:23,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:23" (1/1) ... [2024-09-20 12:58:23,859 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:58:24,011 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] [2024-09-20 12:58:24,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:58:24,037 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:58:24,048 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] [2024-09-20 12:58:24,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:58:24,066 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:58:24,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24 WrapperNode [2024-09-20 12:58:24,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:58:24,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:58:24,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:58:24,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:58:24,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,088 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:58:24,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:58:24,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:58:24,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:58:24,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:58:24,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,117 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:58:24,118 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,125 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:58:24,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:58:24,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:58:24,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:58:24,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (1/1) ... [2024-09-20 12:58:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:58:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:24,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 12:58:24,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 12:58:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:58:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:58:24,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:58:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:58:24,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:58:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:58:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:58:24,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:58:24,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:58:24,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:58:24,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:58:24,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:58:24,246 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:58:24,248 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:58:24,375 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:58:24,375 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:58:24,392 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:58:24,392 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 12:58:24,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:24 BoogieIcfgContainer [2024-09-20 12:58:24,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:58:24,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:58:24,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:58:24,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:58:24,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:58:23" (1/3) ... [2024-09-20 12:58:24,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78792b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:24, skipping insertion in model container [2024-09-20 12:58:24,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:24" (2/3) ... [2024-09-20 12:58:24,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78792b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:24, skipping insertion in model container [2024-09-20 12:58:24,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:24" (3/3) ... [2024-09-20 12:58:24,401 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2024-09-20 12:58:24,415 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:58:24,416 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:58:24,473 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:58:24,481 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;@6fdc244e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:58:24,482 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:58:24,486 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) [2024-09-20 12:58:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:58:24,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:24,494 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] [2024-09-20 12:58:24,496 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:24,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-20 12:58:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:24,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485286207] [2024-09-20 12:58:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:24,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485286207] [2024-09-20 12:58:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485286207] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:58:24,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:58:24,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:58:24,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589733940] [2024-09-20 12:58:24,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:24,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:58:24,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:24,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:58:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:58:24,718 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) [2024-09-20 12:58:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:24,757 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-20 12:58:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:58:24,760 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 [2024-09-20 12:58:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:24,766 INFO L225 Difference]: With dead ends: 54 [2024-09-20 12:58:24,766 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 12:58:24,769 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 [2024-09-20 12:58:24,772 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 [2024-09-20 12:58:24,773 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] [2024-09-20 12:58:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 12:58:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-20 12:58:24,805 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) [2024-09-20 12:58:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 12:58:24,807 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-20 12:58:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:24,808 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 12:58:24,808 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) [2024-09-20 12:58:24,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 12:58:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:58:24,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:24,811 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] [2024-09-20 12:58:24,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:58:24,812 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:24,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-20 12:58:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362665278] [2024-09-20 12:58:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281063016] [2024-09-20 12:58:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:24,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:24,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:58:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:24,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:58:24,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:25,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362665278] [2024-09-20 12:58:25,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281063016] [2024-09-20 12:58:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281063016] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:25,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:58:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-20 12:58:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225260906] [2024-09-20 12:58:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:25,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:58:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:58:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:58:25,348 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) [2024-09-20 12:58:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:25,454 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-20 12:58:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:58:25,455 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 [2024-09-20 12:58:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:25,456 INFO L225 Difference]: With dead ends: 37 [2024-09-20 12:58:25,457 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 12:58:25,457 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 [2024-09-20 12:58:25,458 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 [2024-09-20 12:58:25,459 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] [2024-09-20 12:58:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 12:58:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-20 12:58:25,467 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) [2024-09-20 12:58:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 12:58:25,468 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-20 12:58:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:25,469 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 12:58:25,469 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) [2024-09-20 12:58:25,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 12:58:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:58:25,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:25,471 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] [2024-09-20 12:58:25,484 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:58:25,672 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:25,673 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:25,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-20 12:58:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:25,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371533421] [2024-09-20 12:58:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:58:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:25,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371533421] [2024-09-20 12:58:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371533421] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:58:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:58:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 12:58:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858471762] [2024-09-20 12:58:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:25,927 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:58:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:58:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:58:25,928 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) [2024-09-20 12:58:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:26,004 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-20 12:58:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:58:26,005 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 [2024-09-20 12:58:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:26,006 INFO L225 Difference]: With dead ends: 42 [2024-09-20 12:58:26,006 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 12:58:26,007 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 [2024-09-20 12:58:26,008 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:26,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 12:58:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-20 12:58:26,021 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) [2024-09-20 12:58:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-20 12:58:26,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-20 12:58:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:26,026 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-20 12:58:26,026 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) [2024-09-20 12:58:26,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-20 12:58:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:58:26,027 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:26,027 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] [2024-09-20 12:58:26,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:58:26,028 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:26,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-20 12:58:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:26,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94820127] [2024-09-20 12:58:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921043736] [2024-09-20 12:58:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:26,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:26,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:26,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:58:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:58:26,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:26,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:28,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94820127] [2024-09-20 12:58:28,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921043736] [2024-09-20 12:58:28,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921043736] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:28,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:58:28,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-20 12:58:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691505521] [2024-09-20 12:58:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:28,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:58:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:58:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:58:28,314 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) [2024-09-20 12:58:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:28,467 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-20 12:58:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:58:28,468 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 [2024-09-20 12:58:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:28,469 INFO L225 Difference]: With dead ends: 45 [2024-09-20 12:58:28,469 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:58:28,469 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 [2024-09-20 12:58:28,470 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 [2024-09-20 12:58:28,471 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] [2024-09-20 12:58:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:58:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-20 12:58:28,483 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) [2024-09-20 12:58:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-20 12:58:28,486 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-20 12:58:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:28,487 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-20 12:58:28,487 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) [2024-09-20 12:58:28,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-20 12:58:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:58:28,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:28,489 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] [2024-09-20 12:58:28,505 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:58:28,693 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 [2024-09-20 12:58:28,695 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:28,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-20 12:58:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10151062] [2024-09-20 12:58:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278591179] [2024-09-20 12:58:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:28,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:28,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:28,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:28,736 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:58:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:28,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:58:28,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:29,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:29,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:29,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10151062] [2024-09-20 12:58:29,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:29,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278591179] [2024-09-20 12:58:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278591179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:29,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:29,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-20 12:58:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796125701] [2024-09-20 12:58:29,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:29,723 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:58:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:58:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:58:29,725 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) [2024-09-20 12:58:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:30,380 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-20 12:58:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 12:58:30,381 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 [2024-09-20 12:58:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:30,383 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:58:30,383 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 12:58:30,384 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 [2024-09-20 12:58:30,387 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 [2024-09-20 12:58:30,388 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] [2024-09-20 12:58:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 12:58:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 12:58:30,410 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) [2024-09-20 12:58:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-20 12:58:30,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-20 12:58:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:30,414 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-20 12:58:30,414 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) [2024-09-20 12:58:30,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-20 12:58:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:58:30,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:30,416 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] [2024-09-20 12:58:30,433 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:58:30,621 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 [2024-09-20 12:58:30,622 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:30,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-20 12:58:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:30,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141971667] [2024-09-20 12:58:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972450] [2024-09-20 12:58:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:30,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:30,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:30,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:58:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:30,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:58:30,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:58:30,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:58:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141971667] [2024-09-20 12:58:30,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972450] [2024-09-20 12:58:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972450] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:30,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:30,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-20 12:58:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436392382] [2024-09-20 12:58:30,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:30,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 12:58:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 12:58:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:58:30,831 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) [2024-09-20 12:58:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:30,917 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 12:58:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:58:30,917 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 [2024-09-20 12:58:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:30,918 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:58:30,919 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 12:58:30,919 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 [2024-09-20 12:58:30,919 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-20 12:58:30,920 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] [2024-09-20 12:58:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 12:58:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 12:58:30,936 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) [2024-09-20 12:58:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-20 12:58:30,937 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-20 12:58:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:30,937 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-20 12:58:30,937 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) [2024-09-20 12:58:30,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-20 12:58:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 12:58:30,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:30,939 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] [2024-09-20 12:58:30,956 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:58:31,139 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 [2024-09-20 12:58:31,140 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:31,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-20 12:58:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260349246] [2024-09-20 12:58:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:31,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843339277] [2024-09-20 12:58:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:31,181 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) [2024-09-20 12:58:31,185 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:58:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:31,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:58:31,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 12:58:31,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 12:58:39,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:39,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260349246] [2024-09-20 12:58:39,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:39,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843339277] [2024-09-20 12:58:39,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843339277] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:39,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:39,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-20 12:58:39,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600191205] [2024-09-20 12:58:39,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:39,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:58:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:58:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:58:39,009 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) [2024-09-20 12:58:43,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:58:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:45,918 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-20 12:58:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:58:45,919 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 [2024-09-20 12:58:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:45,920 INFO L225 Difference]: With dead ends: 90 [2024-09-20 12:58:45,920 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 12:58:45,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:58:45,921 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, 3.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:45,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-20 12:58:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 12:58:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-20 12:58:45,945 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) [2024-09-20 12:58:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-20 12:58:45,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-20 12:58:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:45,946 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-20 12:58:45,946 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) [2024-09-20 12:58:45,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-20 12:58:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:58:45,948 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:45,948 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] [2024-09-20 12:58:45,969 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:58:46,152 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 [2024-09-20 12:58:46,153 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:46,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-20 12:58:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425247183] [2024-09-20 12:58:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:46,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960837101] [2024-09-20 12:58:46,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:58:46,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:46,211 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) [2024-09-20 12:58:46,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:58:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:58:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:58:46,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 12:58:46,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 12:58:47,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 12:58:57,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425247183] [2024-09-20 12:58:57,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960837101] [2024-09-20 12:58:57,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960837101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:57,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:57,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 31 [2024-09-20 12:58:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943420541] [2024-09-20 12:58:57,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:57,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:58:57,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:58:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:58:57,575 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) [2024-09-20 12:59:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:59:10,903 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2024-09-20 12:59:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:59:10,903 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 [2024-09-20 12:59:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:59:10,904 INFO L225 Difference]: With dead ends: 123 [2024-09-20 12:59:10,904 INFO L226 Difference]: Without dead ends: 96 [2024-09-20 12:59:10,905 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:59:10,906 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s 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 [2024-09-20 12:59:10,907 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] [2024-09-20 12:59:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-20 12:59:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-09-20 12:59:10,940 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) [2024-09-20 12:59:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-09-20 12:59:10,941 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 63 [2024-09-20 12:59:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:59:10,941 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-09-20 12:59:10,941 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) [2024-09-20 12:59:10,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:59:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-09-20 12:59:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 12:59:10,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:59:10,943 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] [2024-09-20 12:59:10,956 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:59:11,143 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 [2024-09-20 12:59:11,144 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:59:11,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:59:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash 988892572, now seen corresponding path program 3 times [2024-09-20 12:59:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:59:11,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881274683] [2024-09-20 12:59:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:59:11,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:59:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:59:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:59:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:59:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:59:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:59:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:59:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:59:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:59:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:59:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:59:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 69 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 12:59:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:59:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881274683] [2024-09-20 12:59:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881274683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:59:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202469642] [2024-09-20 12:59:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:59:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:59:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:59:12,218 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) [2024-09-20 12:59:12,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:59:12,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:59:12,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:59:12,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 12:59:12,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:59:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 12:59:14,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:59:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 12:59:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202469642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:59:21,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:59:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 15] total 42 [2024-09-20 12:59:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801242489] [2024-09-20 12:59:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:59:21,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 12:59:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:59:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 12:59:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 12:59:21,566 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) [2024-09-20 12:59:48,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 12:59:52,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 13:00:21,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 13:00:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:00:24,820 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2024-09-20 13:00:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-20 13:00:24,821 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 [2024-09-20 13:00:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:00:24,822 INFO L225 Difference]: With dead ends: 215 [2024-09-20 13:00:24,823 INFO L226 Difference]: Without dead ends: 110 [2024-09-20 13:00:24,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=1559, Invalid=6995, Unknown=2, NotChecked=0, Total=8556 [2024-09-20 13:00:24,829 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s 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, 17.9s IncrementalHoareTripleChecker+Time [2024-09-20 13:00:24,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 516 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 869 Invalid, 3 Unknown, 0 Unchecked, 17.9s Time] [2024-09-20 13:00:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-20 13:00:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-09-20 13:00:24,901 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) [2024-09-20 13:00:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2024-09-20 13:00:24,902 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 72 [2024-09-20 13:00:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:00:24,902 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2024-09-20 13:00:24,902 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) [2024-09-20 13:00:24,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:00:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2024-09-20 13:00:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 13:00:24,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:00:24,904 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] [2024-09-20 13:00:24,916 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:00:25,104 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 [2024-09-20 13:00:25,104 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:00:25,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:00:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1255090726, now seen corresponding path program 2 times [2024-09-20 13:00:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:00:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979411031] [2024-09-20 13:00:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:00:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:00:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:00:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:00:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:00:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:00:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:00:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 13:00:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 13:00:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 13:00:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 13:00:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:00:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:00:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:00:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979411031] [2024-09-20 13:00:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979411031] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:00:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545817696] [2024-09-20 13:00:25,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:00:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:00:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:00:25,851 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) [2024-09-20 13:00:25,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:00:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:00:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:00:25,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 13:00:25,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:00:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:00:26,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:00:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 73 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:00:27,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545817696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:00:27,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:00:27,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2024-09-20 13:00:27,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911086454] [2024-09-20 13:00:27,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:00:27,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 13:00:27,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:00:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 13:00:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 13:00:27,450 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) [2024-09-20 13:00:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:00:27,839 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-09-20 13:00:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:00:27,840 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 [2024-09-20 13:00:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:00:27,841 INFO L225 Difference]: With dead ends: 111 [2024-09-20 13:00:27,841 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:00:27,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:00:27,842 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:00:27,843 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 151 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:00:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:00:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:00:27,845 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) [2024-09-20 13:00:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:00:27,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2024-09-20 13:00:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:00:27,846 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:00:27,846 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) [2024-09-20 13:00:27,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:00:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:00:27,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:00:27,849 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 13:00:27,865 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 13:00:28,049 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 [2024-09-20 13:00:28,052 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2024-09-20 13:00:28,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 13:00:36,304 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:00:36,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:00:36 BoogieIcfgContainer [2024-09-20 13:00:36,327 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:00:36,327 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 13:00:36,327 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 13:00:36,327 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 13:00:36,328 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:24" (3/4) ... [2024-09-20 13:00:36,329 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 13:00:36,380 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 13:00:36,380 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 13:00:36,381 INFO L158 Benchmark]: Toolchain (without parser) took 132549.12ms. Allocated memory was 180.4MB in the beginning and 247.5MB in the end (delta: 67.1MB). Free memory was 125.0MB in the beginning and 203.4MB in the end (delta: -78.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:00:36,381 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 180.4MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:00:36,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.11ms. Allocated memory is still 180.4MB. Free memory was 124.1MB in the beginning and 112.8MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 13:00:36,382 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.08ms. Allocated memory is still 180.4MB. Free memory was 112.8MB in the beginning and 112.4MB in the end (delta: 411.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:00:36,383 INFO L158 Benchmark]: Boogie Preprocessor took 37.32ms. Allocated memory is still 180.4MB. Free memory was 112.4MB in the beginning and 110.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:00:36,385 INFO L158 Benchmark]: RCFGBuilder took 265.94ms. Allocated memory is still 180.4MB. Free memory was 110.7MB in the beginning and 96.9MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 13:00:36,385 INFO L158 Benchmark]: TraceAbstraction took 131931.61ms. Allocated memory was 180.4MB in the beginning and 247.5MB in the end (delta: 67.1MB). Free memory was 96.9MB in the beginning and 205.5MB in the end (delta: -108.6MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. [2024-09-20 13:00:36,386 INFO L158 Benchmark]: Witness Printer took 53.21ms. Allocated memory is still 247.5MB. Free memory was 205.5MB in the beginning and 203.4MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:00:36,387 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 180.4MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.11ms. Allocated memory is still 180.4MB. Free memory was 124.1MB in the beginning and 112.8MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.08ms. Allocated memory is still 180.4MB. Free memory was 112.8MB in the beginning and 112.4MB in the end (delta: 411.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.32ms. Allocated memory is still 180.4MB. Free memory was 112.4MB in the beginning and 110.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 265.94ms. Allocated memory is still 180.4MB. Free memory was 110.7MB in the beginning and 96.9MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 131931.61ms. Allocated memory was 180.4MB in the beginning and 247.5MB in the end (delta: 67.1MB). Free memory was 96.9MB in the beginning and 205.5MB in the end (delta: -108.6MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. * Witness Printer took 53.21ms. Allocated memory is still 247.5MB. Free memory was 205.5MB in the beginning and 203.4MB in the end (delta: 2.1MB). There was no memory consumed. 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: 123.6s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 85.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 29.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 322 mSDsluCounter, 1739 SdHoareTripleChecker+Invalid, 28.7s 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, 74.9s 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, 35.6s 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: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 13:00:36,603 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 [2024-09-20 13:00:36,616 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 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE