./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/egcd2-ll_valuebound2.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 ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:13:24,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:13:24,123 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:13:24,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:13:24,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:13:24,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:13:24,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:13:24,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:13:24,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:13:24,181 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:13:24,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:13:24,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:13:24,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:13:24,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:13:24,185 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:13:24,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:13:24,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:13:24,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:13:24,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:13:24,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:13:24,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:13:24,191 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:13:24,191 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:13:24,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:13:24,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:13:24,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:13:24,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:13:24,192 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:13:24,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:13:24,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:13:24,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:13:24,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:13:24,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:13:24,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:13:24,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:13:24,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:13:24,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:13:24,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:13:24,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:13:24,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:13:24,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:13:24,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:13:24,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:13:24,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:13:24,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:13:24,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:13:24,549 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:13:24,549 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:13:24,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-15 19:13:26,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:13:26,345 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:13:26,346 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-15 19:13:26,360 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bd54ee444/2bdb527bb83446fcbf5aa4ee3619d7d5/FLAG00d66abbc [2024-09-15 19:13:26,379 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bd54ee444/2bdb527bb83446fcbf5aa4ee3619d7d5 [2024-09-15 19:13:26,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:13:26,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:13:26,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:13:26,386 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:13:26,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:13:26,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8b1435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26, skipping insertion in model container [2024-09-15 19:13:26,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,415 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:13:26,589 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/egcd2-ll_valuebound2.c[490,503] [2024-09-15 19:13:26,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:13:26,638 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:13:26,648 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/egcd2-ll_valuebound2.c[490,503] [2024-09-15 19:13:26,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:13:26,685 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:13:26,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26 WrapperNode [2024-09-15 19:13:26,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:13:26,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:13:26,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:13:26,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:13:26,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,716 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:13:26,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:13:26,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:13:26,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:13:26,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:13:26,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,731 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,748 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]. [2024-09-15 19:13:26,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:13:26,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:13:26,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:13:26,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:13:26,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (1/1) ... [2024-09-15 19:13:26,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:13:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:26,824 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) [2024-09-15 19:13:26,828 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 [2024-09-15 19:13:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:13:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:13:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:13:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:13:26,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:13:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:13:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:13:26,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:13:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:13:26,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:13:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:13:26,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:13:26,939 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:13:26,943 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:13:27,174 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-15 19:13:27,175 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:13:27,208 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:13:27,209 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:13:27,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:13:27 BoogieIcfgContainer [2024-09-15 19:13:27,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:13:27,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:13:27,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:13:27,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:13:27,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:13:26" (1/3) ... [2024-09-15 19:13:27,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7d877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:13:27, skipping insertion in model container [2024-09-15 19:13:27,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:13:26" (2/3) ... [2024-09-15 19:13:27,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7d877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:13:27, skipping insertion in model container [2024-09-15 19:13:27,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:13:27" (3/3) ... [2024-09-15 19:13:27,220 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2024-09-15 19:13:27,238 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:13:27,238 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:13:27,308 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:13:27,315 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;@6b26b66b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:13:27,316 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:13:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-15 19:13:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 19:13:27,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:27,330 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:27,330 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-15 19:13:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:27,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854592525] [2024-09-15 19:13:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:13:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854592525] [2024-09-15 19:13:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854592525] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:27,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:27,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:13:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405071708] [2024-09-15 19:13:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:27,645 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:13:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:13:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:13:27,674 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:13:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:27,718 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-15 19:13:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:13:27,721 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-15 19:13:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:27,730 INFO L225 Difference]: With dead ends: 70 [2024-09-15 19:13:27,731 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:13:27,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:13:27,740 INFO L434 NwaCegarLoop]: 47 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, 47 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 [2024-09-15 19:13:27,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:13:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-15 19:13:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:13:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-15 19:13:27,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-15 19:13:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:27,789 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-15 19:13:27,789 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:13:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-15 19:13:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 19:13:27,794 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:27,794 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:27,795 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:13:27,796 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:27,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-15 19:13:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695650116] [2024-09-15 19:13:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 19:13:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695650116] [2024-09-15 19:13:28,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695650116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:28,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073248382] [2024-09-15 19:13:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:28,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:28,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:28,267 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) [2024-09-15 19:13:28,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:13:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:28,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:13:28,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 19:13:28,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073248382] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:28,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:28,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-15 19:13:28,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495357263] [2024-09-15 19:13:28,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:28,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:13:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:13:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:13:28,746 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-15 19:13:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:29,034 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-15 19:13:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:13:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-15 19:13:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:29,037 INFO L225 Difference]: With dead ends: 55 [2024-09-15 19:13:29,037 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 19:13:29,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:13:29,039 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:29,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:13:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 19:13:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-15 19:13:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 19:13:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-15 19:13:29,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-15 19:13:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:29,062 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-15 19:13:29,062 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-15 19:13:29,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-15 19:13:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:13:29,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:29,066 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:29,085 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:13:29,267 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 [2024-09-15 19:13:29,267 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:29,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-15 19:13:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:29,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73928254] [2024-09-15 19:13:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427222837] [2024-09-15 19:13:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:29,303 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) [2024-09-15 19:13:29,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:13:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:29,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:13:29,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:13:29,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73928254] [2024-09-15 19:13:29,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427222837] [2024-09-15 19:13:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427222837] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:29,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338219018] [2024-09-15 19:13:29,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:29,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:29,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:29,422 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-15 19:13:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:29,486 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-15 19:13:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-15 19:13:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:29,489 INFO L225 Difference]: With dead ends: 65 [2024-09-15 19:13:29,489 INFO L226 Difference]: Without dead ends: 63 [2024-09-15 19:13:29,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:13:29,490 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:29,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-15 19:13:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-15 19:13:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:13:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-15 19:13:29,515 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-15 19:13:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:29,515 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-15 19:13:29,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-15 19:13:29,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-15 19:13:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 19:13:29,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:29,519 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:29,534 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:29,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:29,720 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:29,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-15 19:13:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:29,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959868953] [2024-09-15 19:13:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:29,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631612115] [2024-09-15 19:13:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:29,762 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) [2024-09-15 19:13:29,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:13:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:29,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:13:29,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:13:29,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:29,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959868953] [2024-09-15 19:13:29,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631612115] [2024-09-15 19:13:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631612115] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294344579] [2024-09-15 19:13:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:29,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:29,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:29,966 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-15 19:13:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:30,033 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-15 19:13:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-15 19:13:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:30,037 INFO L225 Difference]: With dead ends: 61 [2024-09-15 19:13:30,038 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 19:13:30,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:13:30,040 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:30,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 19:13:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-15 19:13:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:13:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-15 19:13:30,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-15 19:13:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:30,066 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-15 19:13:30,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-15 19:13:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-15 19:13:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 19:13:30,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:30,067 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:30,088 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:13:30,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:30,272 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:30,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-15 19:13:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237911091] [2024-09-15 19:13:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:30,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764129436] [2024-09-15 19:13:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:30,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:30,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:30,310 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) [2024-09-15 19:13:30,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:13:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:30,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:13:30,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 19:13:30,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:13:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237911091] [2024-09-15 19:13:30,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764129436] [2024-09-15 19:13:30,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764129436] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:30,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357136876] [2024-09-15 19:13:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:30,502 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:30,505 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:13:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:30,577 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-15 19:13:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:13:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-15 19:13:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:30,579 INFO L225 Difference]: With dead ends: 65 [2024-09-15 19:13:30,579 INFO L226 Difference]: Without dead ends: 63 [2024-09-15 19:13:30,579 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:13:30,580 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:30,580 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-15 19:13:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-15 19:13:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:13:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-15 19:13:30,596 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-15 19:13:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:30,597 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-15 19:13:30,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:13:30,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-15 19:13:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-15 19:13:30,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:30,598 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:30,618 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:13:30,799 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:30,799 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-15 19:13:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:30,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260217364] [2024-09-15 19:13:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349260969] [2024-09-15 19:13:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:30,843 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) [2024-09-15 19:13:30,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:13:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:30,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:13:30,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 19:13:30,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 19:13:31,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260217364] [2024-09-15 19:13:31,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349260969] [2024-09-15 19:13:31,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349260969] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:31,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:31,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-15 19:13:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057251300] [2024-09-15 19:13:31,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:31,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:13:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:13:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:13:31,113 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-15 19:13:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:31,256 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-15 19:13:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:13:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-15 19:13:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:31,260 INFO L225 Difference]: With dead ends: 90 [2024-09-15 19:13:31,260 INFO L226 Difference]: Without dead ends: 88 [2024-09-15 19:13:31,260 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:13:31,261 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:31,261 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-15 19:13:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-15 19:13:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 19:13:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-15 19:13:31,285 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-15 19:13:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:31,287 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-15 19:13:31,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-15 19:13:31,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-15 19:13:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-15 19:13:31,288 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:31,288 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:31,307 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:31,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:13:31,490 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:31,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-15 19:13:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:31,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402172317] [2024-09-15 19:13:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:13:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:13:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:13:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:13:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 19:13:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402172317] [2024-09-15 19:13:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402172317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593085689] [2024-09-15 19:13:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:31,731 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) [2024-09-15 19:13:31,732 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:13:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:31,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:13:31,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 19:13:31,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 19:13:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593085689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:31,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:13:31,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-15 19:13:31,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462577320] [2024-09-15 19:13:31,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:31,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:13:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:13:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:13:31,938 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-15 19:13:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:32,175 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-15 19:13:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:13:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-15 19:13:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:32,178 INFO L225 Difference]: With dead ends: 105 [2024-09-15 19:13:32,178 INFO L226 Difference]: Without dead ends: 97 [2024-09-15 19:13:32,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:13:32,179 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:32,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-15 19:13:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-15 19:13:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-15 19:13:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-15 19:13:32,228 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-15 19:13:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:32,228 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-15 19:13:32,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-15 19:13:32,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-15 19:13:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-15 19:13:32,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:32,231 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:32,250 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:32,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:32,431 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:32,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-15 19:13:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:32,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107096555] [2024-09-15 19:13:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:32,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100360022] [2024-09-15 19:13:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:32,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:32,467 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) [2024-09-15 19:13:32,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:13:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:32,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-15 19:13:32,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-15 19:13:32,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:32,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107096555] [2024-09-15 19:13:32,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100360022] [2024-09-15 19:13:32,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100360022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:32,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:13:32,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-15 19:13:32,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560568455] [2024-09-15 19:13:32,748 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:32,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:13:32,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:13:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:13:32,750 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:13:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:32,879 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-15 19:13:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:13:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-15 19:13:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:32,881 INFO L225 Difference]: With dead ends: 123 [2024-09-15 19:13:32,881 INFO L226 Difference]: Without dead ends: 120 [2024-09-15 19:13:32,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:13:32,882 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:32,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-15 19:13:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-15 19:13:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-15 19:13:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-15 19:13:32,928 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-15 19:13:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:32,929 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-15 19:13:32,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:13:32,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-15 19:13:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-15 19:13:32,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:32,934 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:32,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:13:33,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:33,135 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:33,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-15 19:13:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:33,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386096494] [2024-09-15 19:13:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:33,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148638306] [2024-09-15 19:13:33,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:13:33,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:33,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:33,164 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) [2024-09-15 19:13:33,166 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:13:33,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:13:33,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:13:33,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 19:13:33,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-15 19:13:33,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386096494] [2024-09-15 19:13:33,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148638306] [2024-09-15 19:13:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148638306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:33,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:13:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-15 19:13:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959769640] [2024-09-15 19:13:33,576 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:33,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:13:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:13:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:13:33,578 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:13:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:33,767 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-15 19:13:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:13:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-15 19:13:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:33,770 INFO L225 Difference]: With dead ends: 129 [2024-09-15 19:13:33,770 INFO L226 Difference]: Without dead ends: 127 [2024-09-15 19:13:33,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:13:33,771 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:33,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-15 19:13:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-15 19:13:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-15 19:13:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-15 19:13:33,819 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-15 19:13:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:33,821 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-15 19:13:33,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:13:33,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-15 19:13:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-15 19:13:33,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:33,824 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2024-09-15 19:13:33,843 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:34,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:34,029 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:34,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-15 19:13:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191196121] [2024-09-15 19:13:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:34,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295332058] [2024-09-15 19:13:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:13:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:34,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:13:34,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 19:13:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:13:34,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-15 19:13:34,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-15 19:13:35,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191196121] [2024-09-15 19:13:47,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295332058] [2024-09-15 19:13:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295332058] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:47,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:13:47,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:13:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982330909] [2024-09-15 19:13:47,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:47,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:13:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:13:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-15 19:13:47,075 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-15 19:13:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:47,508 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-15 19:13:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:13:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-15 19:13:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:47,511 INFO L225 Difference]: With dead ends: 133 [2024-09-15 19:13:47,513 INFO L226 Difference]: Without dead ends: 131 [2024-09-15 19:13:47,513 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-15 19:13:47,514 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:47,514 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:13:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-15 19:13:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-15 19:13:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-15 19:13:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-15 19:13:47,556 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-15 19:13:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:47,556 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-15 19:13:47,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-15 19:13:47,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-15 19:13:47,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-15 19:13:47,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:47,558 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:47,571 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:47,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 19:13:47,759 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:47,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-15 19:13:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662854983] [2024-09-15 19:13:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963989481] [2024-09-15 19:13:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:47,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:47,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:47,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:47,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:13:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:47,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-15 19:13:47,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-15 19:13:48,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-15 19:13:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662854983] [2024-09-15 19:13:49,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963989481] [2024-09-15 19:13:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963989481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:49,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-15 19:13:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84789588] [2024-09-15 19:13:49,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:49,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:13:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:13:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:13:49,038 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-15 19:13:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:51,895 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-15 19:13:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:13:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-15 19:13:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:51,899 INFO L225 Difference]: With dead ends: 229 [2024-09-15 19:13:51,899 INFO L226 Difference]: Without dead ends: 225 [2024-09-15 19:13:51,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:13:51,900 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:51,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-15 19:13:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-15 19:13:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-15 19:13:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-15 19:13:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-15 19:13:51,997 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-15 19:13:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:51,998 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-15 19:13:51,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-15 19:13:51,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-15 19:13:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-15 19:13:51,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:51,999 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1] [2024-09-15 19:13:52,017 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:52,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 19:13:52,204 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-15 19:13:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374748809] [2024-09-15 19:13:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:13:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:13:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:13:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:13:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 19:13:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:13:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:13:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 19:13:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-15 19:13:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-15 19:13:52,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374748809] [2024-09-15 19:13:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374748809] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:13:52,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:13:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:13:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245484098] [2024-09-15 19:13:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:13:52,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:13:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:13:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:13:52,326 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-15 19:13:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:52,448 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-15 19:13:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:13:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-15 19:13:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:52,450 INFO L225 Difference]: With dead ends: 275 [2024-09-15 19:13:52,451 INFO L226 Difference]: Without dead ends: 201 [2024-09-15 19:13:52,452 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:13:52,452 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:52,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:13:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-15 19:13:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-15 19:13:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-15 19:13:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-15 19:13:52,524 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-15 19:13:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:52,524 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-15 19:13:52,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-15 19:13:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-15 19:13:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-15 19:13:52,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:52,526 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-09-15 19:13:52,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-15 19:13:52,526 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:52,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:52,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-15 19:13:52,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:52,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409805582] [2024-09-15 19:13:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:13:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:13:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:13:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:13:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:13:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:13:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 19:13:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 19:13:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:13:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:13:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 19:13:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-15 19:13:52,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409805582] [2024-09-15 19:13:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409805582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702983539] [2024-09-15 19:13:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:52,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:52,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:52,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:52,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:13:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:52,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 19:13:52,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-09-15 19:13:53,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-15 19:13:53,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702983539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:53,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:13:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-09-15 19:13:53,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334650112] [2024-09-15 19:13:53,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:53,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:13:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:53,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:13:53,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:13:53,195 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-15 19:13:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:53,443 INFO L93 Difference]: Finished difference Result 255 states and 363 transitions. [2024-09-15 19:13:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:13:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 106 [2024-09-15 19:13:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:53,446 INFO L225 Difference]: With dead ends: 255 [2024-09-15 19:13:53,446 INFO L226 Difference]: Without dead ends: 168 [2024-09-15 19:13:53,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:13:53,448 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:53,449 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 303 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-15 19:13:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-09-15 19:13:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 89 states have internal predecessors, (99), 68 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2024-09-15 19:13:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2024-09-15 19:13:53,508 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 106 [2024-09-15 19:13:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:53,509 INFO L474 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2024-09-15 19:13:53,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-15 19:13:53,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2024-09-15 19:13:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-15 19:13:53,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:53,511 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-09-15 19:13:53,528 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:53,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,711 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-15 19:13:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:53,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506796640] [2024-09-15 19:13:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:13:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:13:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:13:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:13:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 19:13:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:13:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:13:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 19:13:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:13:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:13:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 19:13:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-15 19:13:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 19:13:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-15 19:13:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506796640] [2024-09-15 19:13:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506796640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053711937] [2024-09-15 19:13:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:53,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:53,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:53,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:53,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:13:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:53,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:13:53,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-15 19:13:53,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-15 19:13:54,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053711937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:54,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:13:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-15 19:13:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503044538] [2024-09-15 19:13:54,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:54,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:13:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:13:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:13:54,071 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-15 19:13:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:54,270 INFO L93 Difference]: Finished difference Result 194 states and 271 transitions. [2024-09-15 19:13:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:13:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-15 19:13:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:54,272 INFO L225 Difference]: With dead ends: 194 [2024-09-15 19:13:54,272 INFO L226 Difference]: Without dead ends: 182 [2024-09-15 19:13:54,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:13:54,273 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:54,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:13:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-09-15 19:13:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2024-09-15 19:13:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 83 states have (on average 1.144578313253012) internal successors, (95), 85 states have internal predecessors, (95), 67 states have call successors, (67), 13 states have call predecessors, (67), 12 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-15 19:13:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 226 transitions. [2024-09-15 19:13:54,326 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 226 transitions. Word has length 120 [2024-09-15 19:13:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:54,326 INFO L474 AbstractCegarLoop]: Abstraction has 163 states and 226 transitions. [2024-09-15 19:13:54,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-15 19:13:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 226 transitions. [2024-09-15 19:13:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-15 19:13:54,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:54,328 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:54,343 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 19:13:54,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:13:54,528 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:54,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-15 19:13:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:54,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711706552] [2024-09-15 19:13:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:13:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:13:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:13:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:13:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:13:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:13:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:13:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:13:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:13:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:13:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:13:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 19:13:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:13:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:13:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 19:13:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:13:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:13:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 19:13:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-15 19:13:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-15 19:13:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:13:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-15 19:13:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711706552] [2024-09-15 19:13:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711706552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:13:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989827234] [2024-09-15 19:13:54,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:13:54,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:54,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:54,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:13:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:13:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:13:54,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 19:13:54,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 103 proven. 18 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2024-09-15 19:13:54,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-15 19:13:55,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989827234] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:55,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:13:55,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-09-15 19:13:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755753100] [2024-09-15 19:13:55,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:55,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:13:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:55,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:13:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:13:55,119 INFO L87 Difference]: Start difference. First operand 163 states and 226 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-15 19:13:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:13:55,405 INFO L93 Difference]: Finished difference Result 196 states and 273 transitions. [2024-09-15 19:13:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 19:13:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 121 [2024-09-15 19:13:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:13:55,407 INFO L225 Difference]: With dead ends: 196 [2024-09-15 19:13:55,407 INFO L226 Difference]: Without dead ends: 160 [2024-09-15 19:13:55,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 271 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:13:55,408 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:13:55,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 413 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:13:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-15 19:13:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-09-15 19:13:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 80 states have (on average 1.1125) internal successors, (89), 82 states have internal predecessors, (89), 67 states have call successors, (67), 13 states have call predecessors, (67), 12 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-15 19:13:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 220 transitions. [2024-09-15 19:13:55,465 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 220 transitions. Word has length 121 [2024-09-15 19:13:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:13:55,465 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 220 transitions. [2024-09-15 19:13:55,465 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-15 19:13:55,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 220 transitions. [2024-09-15 19:13:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-15 19:13:55,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:13:55,467 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:13:55,484 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 19:13:55,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:13:55,668 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:13:55,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:13:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-15 19:13:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:13:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750611657] [2024-09-15 19:13:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:13:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:13:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:13:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255540199] [2024-09-15 19:13:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:13:55,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:13:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:13:55,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:13:55,704 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 19:13:55,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:13:55,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:13:55,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-15 19:13:55,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:13:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 35 proven. 55 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2024-09-15 19:13:56,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:13:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-15 19:13:58,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:13:58,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750611657] [2024-09-15 19:13:58,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:13:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255540199] [2024-09-15 19:13:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255540199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:13:58,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:13:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2024-09-15 19:13:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189161639] [2024-09-15 19:13:58,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:13:58,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:13:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:13:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:13:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:13:58,115 INFO L87 Difference]: Start difference. First operand 160 states and 220 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) [2024-09-15 19:14:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:00,867 INFO L93 Difference]: Finished difference Result 270 states and 385 transitions. [2024-09-15 19:14:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-15 19:14:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) Word has length 137 [2024-09-15 19:14:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:00,869 INFO L225 Difference]: With dead ends: 270 [2024-09-15 19:14:00,869 INFO L226 Difference]: Without dead ends: 237 [2024-09-15 19:14:00,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 19:14:00,871 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 118 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:00,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 544 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-15 19:14:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-15 19:14:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 227. [2024-09-15 19:14:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 118 states have internal predecessors, (132), 96 states have call successors, (96), 16 states have call predecessors, (96), 15 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-15 19:14:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 321 transitions. [2024-09-15 19:14:00,970 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 321 transitions. Word has length 137 [2024-09-15 19:14:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:00,971 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 321 transitions. [2024-09-15 19:14:00,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) [2024-09-15 19:14:00,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 321 transitions. [2024-09-15 19:14:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-15 19:14:00,972 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:00,973 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:14:00,990 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 19:14:01,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 19:14:01,178 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:01,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2038270089, now seen corresponding path program 2 times [2024-09-15 19:14:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516515860] [2024-09-15 19:14:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:14:01,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885036041] [2024-09-15 19:14:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:14:01,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:01,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:14:01,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 19:14:01,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:14:01,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:01,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-15 19:14:01,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2024-09-15 19:14:01,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-09-15 19:14:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516515860] [2024-09-15 19:14:02,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:14:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885036041] [2024-09-15 19:14:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885036041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:02,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:02,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-15 19:14:02,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621252167] [2024-09-15 19:14:02,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:02,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 19:14:02,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 19:14:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:14:02,240 INFO L87 Difference]: Start difference. First operand 227 states and 321 transitions. Second operand has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-15 19:14:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:04,523 INFO L93 Difference]: Finished difference Result 243 states and 335 transitions. [2024-09-15 19:14:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 19:14:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) Word has length 142 [2024-09-15 19:14:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:04,526 INFO L225 Difference]: With dead ends: 243 [2024-09-15 19:14:04,526 INFO L226 Difference]: Without dead ends: 230 [2024-09-15 19:14:04,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 19:14:04,527 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:04,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 447 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-15 19:14:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-15 19:14:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2024-09-15 19:14:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 118 states have (on average 1.11864406779661) internal successors, (132), 119 states have internal predecessors, (132), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-15 19:14:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 316 transitions. [2024-09-15 19:14:04,652 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 316 transitions. Word has length 142 [2024-09-15 19:14:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:04,653 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 316 transitions. [2024-09-15 19:14:04,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-15 19:14:04,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 316 transitions. [2024-09-15 19:14:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-15 19:14:04,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:04,655 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:14:04,672 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-15 19:14:04,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 19:14:04,855 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:04,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1721913771, now seen corresponding path program 3 times [2024-09-15 19:14:04,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:04,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036897083] [2024-09-15 19:14:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:04,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:14:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:14:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:14:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:14:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:14:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:14:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:14:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:14:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:14:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:14:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:14:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:14:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:14:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 19:14:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 19:14:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-15 19:14:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-15 19:14:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 19:14:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 19:14:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-15 19:14:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 19:14:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-15 19:14:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-15 19:14:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-15 19:14:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-15 19:14:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 54 proven. 51 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2024-09-15 19:14:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036897083] [2024-09-15 19:14:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036897083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798550296] [2024-09-15 19:14:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:14:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:05,193 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:14:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 19:14:05,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:14:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:05,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-15 19:14:05,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 121 proven. 62 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2024-09-15 19:14:06,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798550296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:07,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:07,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 21 [2024-09-15 19:14:07,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781083581] [2024-09-15 19:14:07,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:07,089 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:14:07,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:14:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2024-09-15 19:14:07,090 INFO L87 Difference]: Start difference. First operand 229 states and 316 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-15 19:14:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:08,163 INFO L93 Difference]: Finished difference Result 339 states and 470 transitions. [2024-09-15 19:14:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 19:14:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 145 [2024-09-15 19:14:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:08,166 INFO L225 Difference]: With dead ends: 339 [2024-09-15 19:14:08,166 INFO L226 Difference]: Without dead ends: 274 [2024-09-15 19:14:08,167 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 19:14:08,168 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 44 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:08,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 551 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:14:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-09-15 19:14:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2024-09-15 19:14:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 133 states have (on average 1.112781954887218) internal successors, (148), 134 states have internal predecessors, (148), 105 states have call successors, (105), 21 states have call predecessors, (105), 20 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2024-09-15 19:14:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 356 transitions. [2024-09-15 19:14:08,291 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 356 transitions. Word has length 145 [2024-09-15 19:14:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:08,291 INFO L474 AbstractCegarLoop]: Abstraction has 259 states and 356 transitions. [2024-09-15 19:14:08,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-15 19:14:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 356 transitions. [2024-09-15 19:14:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-15 19:14:08,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:08,294 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:14:08,309 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-15 19:14:08,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:08,495 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:08,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-15 19:14:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510534692] [2024-09-15 19:14:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:14:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:14:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:14:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:14:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:14:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:14:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:14:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:14:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:14:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:14:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:14:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:14:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:14:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 19:14:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 19:14:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-15 19:14:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-15 19:14:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 19:14:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 19:14:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-15 19:14:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 19:14:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-15 19:14:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-15 19:14:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-15 19:14:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-15 19:14:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-09-15 19:14:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-09-15 19:14:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 102 proven. 24 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2024-09-15 19:14:08,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:08,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510534692] [2024-09-15 19:14:08,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510534692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:08,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252554974] [2024-09-15 19:14:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:14:08,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:08,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:08,925 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:14:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 19:14:09,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:14:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:09,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 19:14:09,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-15 19:14:09,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252554974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:14,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:14:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2024-09-15 19:14:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502567980] [2024-09-15 19:14:14,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:14,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-15 19:14:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-15 19:14:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=701, Unknown=1, NotChecked=0, Total=812 [2024-09-15 19:14:14,496 INFO L87 Difference]: Start difference. First operand 259 states and 356 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 14 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (41), 12 states have call predecessors, (41), 13 states have call successors, (41) [2024-09-15 19:14:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:15,121 INFO L93 Difference]: Finished difference Result 311 states and 415 transitions. [2024-09-15 19:14:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:14:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 14 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (41), 12 states have call predecessors, (41), 13 states have call successors, (41) Word has length 156 [2024-09-15 19:14:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:15,123 INFO L225 Difference]: With dead ends: 311 [2024-09-15 19:14:15,123 INFO L226 Difference]: Without dead ends: 173 [2024-09-15 19:14:15,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=214, Invalid=1045, Unknown=1, NotChecked=0, Total=1260 [2024-09-15 19:14:15,125 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:15,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 513 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:14:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-15 19:14:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-09-15 19:14:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 93 states have internal predecessors, (101), 65 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2024-09-15 19:14:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2024-09-15 19:14:15,206 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 156 [2024-09-15 19:14:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:15,206 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2024-09-15 19:14:15,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 14 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (41), 12 states have call predecessors, (41), 13 states have call successors, (41) [2024-09-15 19:14:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2024-09-15 19:14:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-15 19:14:15,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:14:15,208 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:14:15,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-15 19:14:15,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:15,413 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:14:15,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -593551816, now seen corresponding path program 4 times [2024-09-15 19:14:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:14:15,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432750395] [2024-09-15 19:14:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:14:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:14:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:14:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:14:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:14:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:14:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:14:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:14:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:14:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:14:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:14:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:14:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:14:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 19:14:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:14:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:14:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 19:14:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:14:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:14:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 19:14:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-15 19:14:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-15 19:14:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-15 19:14:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-15 19:14:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-15 19:14:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-15 19:14:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-15 19:14:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-15 19:14:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-15 19:14:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-15 19:14:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-15 19:14:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:14:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 72 proven. 74 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2024-09-15 19:14:15,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:14:15,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432750395] [2024-09-15 19:14:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432750395] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:14:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105280826] [2024-09-15 19:14:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:14:15,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:14:15,711 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:14:15,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 19:14:15,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:14:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:14:15,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:14:15,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:14:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 234 proven. 68 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2024-09-15 19:14:15,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:14:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 72 proven. 74 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2024-09-15 19:14:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105280826] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:14:16,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:14:16,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2024-09-15 19:14:16,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408705837] [2024-09-15 19:14:16,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:14:16,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:14:16,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:14:16,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:14:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:14:16,148 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 12 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2024-09-15 19:14:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:14:16,408 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2024-09-15 19:14:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:14:16,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 12 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) Word has length 170 [2024-09-15 19:14:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:14:16,410 INFO L225 Difference]: With dead ends: 177 [2024-09-15 19:14:16,410 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:14:16,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 389 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:14:16,413 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 22 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:14:16,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 541 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:14:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:14:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:14:16,417 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) [2024-09-15 19:14:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:14:16,418 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2024-09-15 19:14:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:14:16,418 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:14:16,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 12 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2024-09-15 19:14:16,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:14:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:14:16,419 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:14:16,422 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:14:16,449 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-15 19:14:16,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:14:16,629 INFO L408 BasicCegarLoop]: Path program histogram: [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:14:16,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:14:21,012 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:14:21,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:14:21 BoogieIcfgContainer [2024-09-15 19:14:21,038 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:14:21,039 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:14:21,039 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:14:21,039 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:14:21,040 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:13:27" (3/4) ... [2024-09-15 19:14:21,041 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:14:21,045 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:14:21,046 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-15 19:14:21,046 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:14:21,046 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:14:21,050 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2024-09-15 19:14:21,051 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-09-15 19:14:21,051 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-15 19:14:21,051 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-09-15 19:14:21,148 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:14:21,148 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:14:21,148 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:14:21,149 INFO L158 Benchmark]: Toolchain (without parser) took 54766.02ms. Allocated memory was 65.0MB in the beginning and 220.2MB in the end (delta: 155.2MB). Free memory was 40.7MB in the beginning and 178.2MB in the end (delta: -137.5MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,149 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 41.9MB. Free memory was 24.8MB in the beginning and 24.7MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:14:21,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.74ms. Allocated memory is still 65.0MB. Free memory was 40.5MB in the beginning and 28.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,149 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.53ms. Allocated memory is still 65.0MB. Free memory was 28.6MB in the beginning and 27.6MB in the end (delta: 995.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,150 INFO L158 Benchmark]: Boogie Preprocessor took 50.64ms. Allocated memory is still 65.0MB. Free memory was 27.6MB in the beginning and 25.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:14:21,150 INFO L158 Benchmark]: RCFGBuilder took 441.38ms. Allocated memory is still 65.0MB. Free memory was 25.7MB in the beginning and 31.8MB in the end (delta: -6.0MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,150 INFO L158 Benchmark]: TraceAbstraction took 53825.02ms. Allocated memory was 65.0MB in the beginning and 220.2MB in the end (delta: 155.2MB). Free memory was 31.3MB in the beginning and 183.4MB in the end (delta: -152.2MB). Peak memory consumption was 123.1MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,151 INFO L158 Benchmark]: Witness Printer took 109.38ms. Allocated memory is still 220.2MB. Free memory was 183.4MB in the beginning and 178.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-09-15 19:14:21,152 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 41.9MB. Free memory was 24.8MB in the beginning and 24.7MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.74ms. Allocated memory is still 65.0MB. Free memory was 40.5MB in the beginning and 28.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.53ms. Allocated memory is still 65.0MB. Free memory was 28.6MB in the beginning and 27.6MB in the end (delta: 995.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.64ms. Allocated memory is still 65.0MB. Free memory was 27.6MB in the beginning and 25.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 441.38ms. Allocated memory is still 65.0MB. Free memory was 25.7MB in the beginning and 31.8MB in the end (delta: -6.0MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * TraceAbstraction took 53825.02ms. Allocated memory was 65.0MB in the beginning and 220.2MB in the end (delta: 155.2MB). Free memory was 31.3MB in the beginning and 183.4MB in the end (delta: -152.2MB). Peak memory consumption was 123.1MB. Max. memory is 16.1GB. * Witness Printer took 109.38ms. Allocated memory is still 220.2MB. Free memory was 183.4MB in the beginning and 178.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. 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: 13]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 49.3s, OverallIterations: 20, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 676 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 581 mSDsluCounter, 6250 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5346 mSDsCounter, 702 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4957 IncrementalHoareTripleChecker+Invalid, 5659 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 702 mSolverCounterUnsat, 904 mSDtfsCounter, 4957 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3482 GetRequests, 3081 SyntacticMatches, 31 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 18.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=18, InterpolantAutomatonStates: 258, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 118 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 3647 NumberOfCodeBlocks, 3463 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 3806 ConstructedInterpolants, 0 QuantifiedInterpolants, 13359 SizeOfPredicates, 52 NumberOfNonLiveVariables, 3793 ConjunctsInSsa, 460 ConjunctsInUnsatCore, 37 InterpolantComputations, 5 PerfectInterpolantSequences, 13865/14731 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: 47]: Loop Invariant Derived loop invariant: ((((((((((((((((((r == 0) && (s == 1)) && (a == ((__int128) c + b))) && (0 <= c)) && (b == y)) && (k == 1)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1)) || ((((((((((((((r == 0) && (a == (c + ((__int128) b * k)))) && (s == 1)) && (1 <= a)) && (0 <= c)) && (yy == ((long long) y * y))) && ((c + ((__int128) b * 2)) <= 2)) && (q == 0)) && (1 <= b)) && (xy == ((long long) y * x))) && (a == x)) && (x == (c + ((__int128) k * y)))) && (x <= 2)) && (p == 1))) || ((((((((((((((r == 0) && (y <= 2)) && (k == 0)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (2 == xy)) && (r == 1)) && (c == 2)) && (x == 1)) && (yy == 4)) && (a == 2)) && (q == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 1)) && (a == 2)) && (q == 1)) && (c == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 2)) && (a == 2)) && (c == 0)) && (q == 1))) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: (((((((((((((b == 1) && (s == 0)) && (p == 0)) && (y == xy)) && (r == 1)) && (a == y)) && (x == 1)) && (yy == ((long long) y * y))) && (a == 2)) && (q == 1)) || (((((((((1 <= x) && (y <= 2)) && (b == 0)) && (p == 0)) && (r == 1)) && (a == y)) && (1 <= y)) && ((((__int128) q * x) + ((__int128) y * s)) == 0)) && (x <= 2))) || ((((((((((((r == 0) && (y <= 2)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1))) || (((((((((((long long) x + 1) <= y) && (r == 0)) && (((__int128) ((long long) x * 2) + b) == y)) && (y <= 2)) && (s == 1)) && (((__int128) q + 2) == 0)) && (((__int128) b + 1) <= x)) && (a == x)) && (p == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: 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! [2024-09-15 19:14:21,188 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