./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:58:59,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:59:00,040 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:59:00,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:59:00,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:59:00,073 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:59:00,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:59:00,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:59:00,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:59:00,075 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:59:00,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:59:00,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:59:00,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:59:00,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:59:00,076 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:59:00,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:59:00,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:59:00,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:59:00,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:59:00,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:59:00,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:59:00,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:59:00,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:59:00,083 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:59:00,083 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:59:00,084 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:59:00,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:59:00,084 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:59:00,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:59:00,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:59:00,085 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:59:00,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:59:00,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:59:00,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:59:00,089 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:59:00,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:59:00,089 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:59:00,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:59:00,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:59:00,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:59:00,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:59:00,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:59:00,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:59:00,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:59:00,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:59:00,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:59:00,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:59:00,387 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:59:00,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-20 18:59:01,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:59:01,926 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:59:01,926 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-20 18:59:01,933 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b619fed6a/99d710d4b61e47c5abef82045d05c6fc/FLAG5353d4dfd [2024-09-20 18:59:01,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b619fed6a/99d710d4b61e47c5abef82045d05c6fc [2024-09-20 18:59:01,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:59:01,951 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:59:01,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:59:01,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:59:01,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:59:01,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:59:01" (1/1) ... [2024-09-20 18:59:01,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2472c717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:01, skipping insertion in model container [2024-09-20 18:59:01,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:59:01" (1/1) ... [2024-09-20 18:59:01,984 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:59:02,135 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/loops-crafted-1/watermelon.c[373,386] [2024-09-20 18:59:02,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:59:02,176 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:59:02,184 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/loops-crafted-1/watermelon.c[373,386] [2024-09-20 18:59:02,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:59:02,215 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:59:02,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02 WrapperNode [2024-09-20 18:59:02,216 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:59:02,217 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:59:02,217 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:59:02,217 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:59:02,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,234 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:59:02,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:59:02,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:59:02,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:59:02,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:59:02,243 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,256 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 18:59:02,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:59:02,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:59:02,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:59:02,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:59:02,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (1/1) ... [2024-09-20 18:59:02,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:59:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:02,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:59:02,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:59:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:59:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-20 18:59:02,346 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-20 18:59:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:59:02,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:59:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:59:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-20 18:59:02,348 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-20 18:59:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:59:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:59:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:59:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:59:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:59:02,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:59:02,402 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:59:02,404 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:59:02,550 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 18:59:02,550 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:59:02,575 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:59:02,575 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 18:59:02,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:59:02 BoogieIcfgContainer [2024-09-20 18:59:02,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:59:02,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:59:02,580 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:59:02,583 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:59:02,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:59:01" (1/3) ... [2024-09-20 18:59:02,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e45c0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:59:02, skipping insertion in model container [2024-09-20 18:59:02,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:59:02" (2/3) ... [2024-09-20 18:59:02,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e45c0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:59:02, skipping insertion in model container [2024-09-20 18:59:02,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:59:02" (3/3) ... [2024-09-20 18:59:02,587 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2024-09-20 18:59:02,602 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:59:02,603 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:59:02,651 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:59:02,657 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;@3cd493f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:59:02,657 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:59:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:59:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:59:02,670 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:02,671 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:59:02,672 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:02,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1545535369, now seen corresponding path program 1 times [2024-09-20 18:59:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646101599] [2024-09-20 18:59:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:02,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:03,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:03,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:03,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:59:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:03,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646101599] [2024-09-20 18:59:03,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646101599] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:03,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:59:03,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-20 18:59:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084851241] [2024-09-20 18:59:03,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:03,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:59:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:59:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:59:03,386 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:03,961 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2024-09-20 18:59:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:59:03,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 18:59:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:03,972 INFO L225 Difference]: With dead ends: 80 [2024-09-20 18:59:03,972 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 18:59:03,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:59:03,982 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:03,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:59:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 18:59:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-20 18:59:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-20 18:59:04,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2024-09-20 18:59:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:04,023 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-20 18:59:04,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:04,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-20 18:59:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:59:04,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:04,030 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:04,030 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:59:04,030 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash 964775093, now seen corresponding path program 1 times [2024-09-20 18:59:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145653631] [2024-09-20 18:59:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:59:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:04,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145653631] [2024-09-20 18:59:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145653631] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:59:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:59:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524558294] [2024-09-20 18:59:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:04,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:59:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:59:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:59:04,133 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:59:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:04,221 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-20 18:59:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:59:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-20 18:59:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:04,223 INFO L225 Difference]: With dead ends: 51 [2024-09-20 18:59:04,224 INFO L226 Difference]: Without dead ends: 38 [2024-09-20 18:59:04,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:59:04,226 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:04,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-20 18:59:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-20 18:59:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-20 18:59:04,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2024-09-20 18:59:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:04,245 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-20 18:59:04,245 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:59:04,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-20 18:59:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:59:04,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:04,247 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:04,247 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:59:04,247 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:04,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1908872900, now seen corresponding path program 1 times [2024-09-20 18:59:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149340961] [2024-09-20 18:59:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:59:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149340961] [2024-09-20 18:59:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149340961] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:04,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:59:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:59:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010357474] [2024-09-20 18:59:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:04,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:59:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:59:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:59:04,343 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:04,427 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 18:59:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:59:04,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-20 18:59:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:04,430 INFO L225 Difference]: With dead ends: 67 [2024-09-20 18:59:04,430 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 18:59:04,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:59:04,431 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:04,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 18:59:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 18:59:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-09-20 18:59:04,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2024-09-20 18:59:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:04,451 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-09-20 18:59:04,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:04,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-09-20 18:59:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:59:04,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:04,453 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:04,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:59:04,453 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:04,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1551444720, now seen corresponding path program 1 times [2024-09-20 18:59:04,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:04,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679968491] [2024-09-20 18:59:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:04,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:59:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:04,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:04,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679968491] [2024-09-20 18:59:04,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679968491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:04,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723749474] [2024-09-20 18:59:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:04,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:04,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:04,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:59:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:04,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:59:04,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:59:04,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:59:04,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723749474] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:04,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:59:04,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-09-20 18:59:04,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253012345] [2024-09-20 18:59:04,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:04,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:59:04,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:59:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:59:04,862 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:04,949 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-09-20 18:59:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:59:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-20 18:59:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:04,953 INFO L225 Difference]: With dead ends: 51 [2024-09-20 18:59:04,954 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 18:59:04,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:59:04,955 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:04,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 18:59:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-20 18:59:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-09-20 18:59:04,971 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2024-09-20 18:59:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:04,971 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-09-20 18:59:04,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:04,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-09-20 18:59:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:59:04,973 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:04,973 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:04,990 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 18:59:05,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:05,174 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:05,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1138172918, now seen corresponding path program 1 times [2024-09-20 18:59:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881280284] [2024-09-20 18:59:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 18:59:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:05,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881280284] [2024-09-20 18:59:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881280284] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187453588] [2024-09-20 18:59:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:05,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:05,266 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:59:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 18:59:05,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:05,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187453588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:05,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-20 18:59:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397854069] [2024-09-20 18:59:05,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:05,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:59:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:59:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:59:05,397 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:59:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:05,547 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-20 18:59:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:59:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-20 18:59:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:05,549 INFO L225 Difference]: With dead ends: 68 [2024-09-20 18:59:05,549 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 18:59:05,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:59:05,551 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:05,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 18:59:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 18:59:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-09-20 18:59:05,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2024-09-20 18:59:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:05,562 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-09-20 18:59:05,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:59:05,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-09-20 18:59:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 18:59:05,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:05,564 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:05,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:59:05,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:05,769 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:05,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1107312764, now seen corresponding path program 2 times [2024-09-20 18:59:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:05,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84435160] [2024-09-20 18:59:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:05,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:59:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:05,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84435160] [2024-09-20 18:59:05,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84435160] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:05,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:59:05,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 18:59:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56489926] [2024-09-20 18:59:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:05,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:59:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:59:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:59:05,999 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:06,174 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-09-20 18:59:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:59:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-20 18:59:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:06,177 INFO L225 Difference]: With dead ends: 48 [2024-09-20 18:59:06,178 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 18:59:06,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:59:06,179 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:06,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 18:59:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 18:59:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-20 18:59:06,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2024-09-20 18:59:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:06,200 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-20 18:59:06,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:06,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-20 18:59:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 18:59:06,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:06,201 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:06,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 18:59:06,202 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:06,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash 545445883, now seen corresponding path program 1 times [2024-09-20 18:59:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:06,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875787951] [2024-09-20 18:59:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:06,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:59:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:59:06,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:06,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875787951] [2024-09-20 18:59:06,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875787951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:06,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382174249] [2024-09-20 18:59:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:06,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:06,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:06,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:59:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 18:59:06,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:06,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:06,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382174249] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:06,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:06,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2024-09-20 18:59:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646917961] [2024-09-20 18:59:06,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:06,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:59:06,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:59:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:59:06,464 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 18:59:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:06,643 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-20 18:59:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:59:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-20 18:59:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:06,644 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:59:06,644 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 18:59:06,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:59:06,645 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:06,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 18:59:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 18:59:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-20 18:59:06,657 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2024-09-20 18:59:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:06,657 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-20 18:59:06,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 18:59:06,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-20 18:59:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:59:06,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:06,659 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:06,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:59:06,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:59:06,860 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:06,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash -60565722, now seen corresponding path program 1 times [2024-09-20 18:59:06,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:06,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897352902] [2024-09-20 18:59:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:59:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897352902] [2024-09-20 18:59:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897352902] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425538985] [2024-09-20 18:59:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:06,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:06,973 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:59:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:07,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:59:07,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:07,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:59:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425538985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:07,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:07,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-20 18:59:07,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387331331] [2024-09-20 18:59:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:07,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:59:07,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:59:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:59:07,141 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:59:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:07,298 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-09-20 18:59:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:59:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-20 18:59:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:07,300 INFO L225 Difference]: With dead ends: 54 [2024-09-20 18:59:07,300 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 18:59:07,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:59:07,303 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:07,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 18:59:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 18:59:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:59:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-09-20 18:59:07,315 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 32 [2024-09-20 18:59:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:07,316 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-09-20 18:59:07,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:59:07,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-09-20 18:59:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:59:07,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:07,320 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:07,336 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:59:07,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:07,520 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:07,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 619492648, now seen corresponding path program 1 times [2024-09-20 18:59:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:07,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735585310] [2024-09-20 18:59:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:07,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:07,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:07,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:07,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:59:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:59:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:07,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735585310] [2024-09-20 18:59:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735585310] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:59:07,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:59:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-20 18:59:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468533931] [2024-09-20 18:59:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:59:07,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:59:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:59:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:59:07,730 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:08,038 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-09-20 18:59:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:59:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-20 18:59:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:08,040 INFO L225 Difference]: With dead ends: 53 [2024-09-20 18:59:08,040 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 18:59:08,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:59:08,042 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:08,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 18:59:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-09-20 18:59:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-20 18:59:08,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2024-09-20 18:59:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:08,059 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-20 18:59:08,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:08,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-20 18:59:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:59:08,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:08,063 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-20 18:59:08,063 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-20 18:59:08,063 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:08,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2067916900, now seen corresponding path program 2 times [2024-09-20 18:59:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:08,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855415807] [2024-09-20 18:59:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:08,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:08,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:08,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:59:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:08,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:08,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855415807] [2024-09-20 18:59:08,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855415807] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:08,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658729835] [2024-09-20 18:59:08,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:08,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:08,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:08,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:59:08,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:08,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:59:08,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:08,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:08,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658729835] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:08,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:08,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-20 18:59:08,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425880847] [2024-09-20 18:59:08,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:08,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 18:59:08,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 18:59:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:59:08,970 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:09,382 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-09-20 18:59:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:59:09,383 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-20 18:59:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:09,386 INFO L225 Difference]: With dead ends: 61 [2024-09-20 18:59:09,386 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 18:59:09,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:59:09,388 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:09,388 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 18:59:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-09-20 18:59:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-09-20 18:59:09,403 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2024-09-20 18:59:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:09,403 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-09-20 18:59:09,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:09,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-09-20 18:59:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:59:09,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:09,405 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-20 18:59:09,422 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:59:09,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 18:59:09,606 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:09,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:09,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1242434853, now seen corresponding path program 2 times [2024-09-20 18:59:09,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:09,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016122617] [2024-09-20 18:59:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:09,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:09,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:09,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:59:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016122617] [2024-09-20 18:59:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016122617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207043261] [2024-09-20 18:59:09,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:09,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:09,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:59:09,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:09,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:59:09,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:10,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207043261] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:10,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:10,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-20 18:59:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887381946] [2024-09-20 18:59:10,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:10,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 18:59:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 18:59:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:59:10,478 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:10,901 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2024-09-20 18:59:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:59:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-20 18:59:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:10,902 INFO L225 Difference]: With dead ends: 55 [2024-09-20 18:59:10,902 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 18:59:10,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:59:10,904 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:10,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 18:59:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 18:59:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-09-20 18:59:10,912 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2024-09-20 18:59:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:10,913 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-09-20 18:59:10,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-09-20 18:59:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:59:10,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:10,914 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:10,931 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:11,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 18:59:11,115 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1389102369, now seen corresponding path program 3 times [2024-09-20 18:59:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:11,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037791122] [2024-09-20 18:59:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:11,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:11,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:11,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:59:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:11,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:11,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037791122] [2024-09-20 18:59:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037791122] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:11,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929531264] [2024-09-20 18:59:11,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:11,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:11,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:11,448 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:59:11,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:59:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:11,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 18:59:11,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:11,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929531264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:12,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:12,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-20 18:59:12,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202782122] [2024-09-20 18:59:12,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:12,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 18:59:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 18:59:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:59:12,217 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:12,710 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-20 18:59:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:59:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-20 18:59:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:12,711 INFO L225 Difference]: With dead ends: 61 [2024-09-20 18:59:12,711 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 18:59:12,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:59:12,713 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:12,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 18:59:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-09-20 18:59:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-20 18:59:12,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 34 [2024-09-20 18:59:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:12,725 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-20 18:59:12,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:12,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-20 18:59:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:59:12,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:12,727 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 18:59:12,743 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:12,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:12,928 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:12,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1131745825, now seen corresponding path program 3 times [2024-09-20 18:59:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503308534] [2024-09-20 18:59:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:13,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:13,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:13,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:59:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:13,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503308534] [2024-09-20 18:59:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503308534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363141783] [2024-09-20 18:59:13,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:13,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:13,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:59:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:59:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:13,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 18:59:13,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:13,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363141783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:13,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:13,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-20 18:59:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48533730] [2024-09-20 18:59:13,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:13,946 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 18:59:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 18:59:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:59:13,948 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:14,430 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-09-20 18:59:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:59:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-20 18:59:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:14,432 INFO L225 Difference]: With dead ends: 56 [2024-09-20 18:59:14,434 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 18:59:14,435 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:59:14,435 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:14,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 18:59:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-20 18:59:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-20 18:59:14,451 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2024-09-20 18:59:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:14,451 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-20 18:59:14,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:14,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-20 18:59:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:59:14,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:14,452 INFO L216 NwaCegarLoop]: trace histogram [4, 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] [2024-09-20 18:59:14,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:59:14,653 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:14,653 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:14,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1974259355, now seen corresponding path program 4 times [2024-09-20 18:59:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:14,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395182607] [2024-09-20 18:59:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:14,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:14,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:14,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:59:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395182607] [2024-09-20 18:59:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395182607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455289207] [2024-09-20 18:59:14,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:59:14,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:14,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:14,938 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) [2024-09-20 18:59:14,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:59:14,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:59:14,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:14,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:59:14,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:15,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455289207] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:15,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-20 18:59:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275994091] [2024-09-20 18:59:15,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:15,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 18:59:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 18:59:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 18:59:15,555 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:15,971 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-09-20 18:59:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:59:15,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-20 18:59:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:15,972 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:59:15,972 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 18:59:15,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:59:15,973 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:15,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 18:59:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-09-20 18:59:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-09-20 18:59:15,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2024-09-20 18:59:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:15,982 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-09-20 18:59:15,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-09-20 18:59:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:59:15,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:15,984 INFO L216 NwaCegarLoop]: trace histogram [4, 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] [2024-09-20 18:59:16,000 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:16,187 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:59:16,188 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:16,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1359484736, now seen corresponding path program 4 times [2024-09-20 18:59:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:16,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313475426] [2024-09-20 18:59:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:16,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:16,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:16,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:59:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:16,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:16,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313475426] [2024-09-20 18:59:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313475426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348917417] [2024-09-20 18:59:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:59:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:16,461 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) [2024-09-20 18:59:16,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:59:16,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:59:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:16,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:59:16,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:16,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348917417] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:17,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-20 18:59:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277843790] [2024-09-20 18:59:17,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:17,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 18:59:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 18:59:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 18:59:17,052 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:17,440 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2024-09-20 18:59:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:59:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-20 18:59:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:17,442 INFO L225 Difference]: With dead ends: 57 [2024-09-20 18:59:17,442 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 18:59:17,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:59:17,444 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:17,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 18:59:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 18:59:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-20 18:59:17,453 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2024-09-20 18:59:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:17,453 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-20 18:59:17,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:17,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-20 18:59:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 18:59:17,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:17,455 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-09-20 18:59:17,468 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:17,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:59:17,659 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:17,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1514281526, now seen corresponding path program 5 times [2024-09-20 18:59:17,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:17,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418225179] [2024-09-20 18:59:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:17,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:17,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:17,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:17,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:59:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418225179] [2024-09-20 18:59:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418225179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030367710] [2024-09-20 18:59:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:59:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:17,989 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) [2024-09-20 18:59:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 18:59:18,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:59:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:18,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:59:18,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:18,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:18,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030367710] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:18,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-20 18:59:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729778148] [2024-09-20 18:59:18,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:18,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 18:59:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 18:59:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:59:18,707 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:19,132 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-09-20 18:59:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:59:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-20 18:59:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:19,133 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:59:19,133 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 18:59:19,134 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:59:19,135 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:19,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 18:59:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-09-20 18:59:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-09-20 18:59:19,143 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2024-09-20 18:59:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:19,143 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-09-20 18:59:19,143 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:19,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-09-20 18:59:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 18:59:19,144 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:19,144 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-09-20 18:59:19,157 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 18:59:19,345 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:59:19,345 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:19,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1975485178, now seen corresponding path program 5 times [2024-09-20 18:59:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:19,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889369263] [2024-09-20 18:59:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:19,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:19,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:19,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:19,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:59:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:19,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889369263] [2024-09-20 18:59:19,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889369263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:19,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537836770] [2024-09-20 18:59:19,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:59:19,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:19,668 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) [2024-09-20 18:59:19,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:59:19,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:59:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:19,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:59:19,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:19,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537836770] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:20,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:20,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-20 18:59:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471475302] [2024-09-20 18:59:20,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:20,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 18:59:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 18:59:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:59:20,433 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:20,957 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-09-20 18:59:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:59:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-20 18:59:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:20,958 INFO L225 Difference]: With dead ends: 58 [2024-09-20 18:59:20,958 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 18:59:20,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:59:20,960 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:20,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 18:59:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 18:59:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-20 18:59:20,968 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2024-09-20 18:59:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:20,969 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-20 18:59:20,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:20,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-20 18:59:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:59:20,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:20,970 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 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] [2024-09-20 18:59:20,986 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:21,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:59:21,174 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:21,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1819133756, now seen corresponding path program 6 times [2024-09-20 18:59:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714976855] [2024-09-20 18:59:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:21,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:21,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:21,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:59:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714976855] [2024-09-20 18:59:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714976855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:21,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826900214] [2024-09-20 18:59:21,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:59:21,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:21,462 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) [2024-09-20 18:59:21,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:59:21,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:59:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:21,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:59:21,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:21,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:22,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826900214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:22,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:22,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-20 18:59:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468627545] [2024-09-20 18:59:22,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:22,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:59:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:59:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:59:22,130 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:22,492 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-20 18:59:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:59:22,493 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-20 18:59:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:22,493 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:59:22,493 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 18:59:22,494 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 18:59:22,495 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:22,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 18:59:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-09-20 18:59:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-09-20 18:59:22,504 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 37 [2024-09-20 18:59:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:22,504 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-09-20 18:59:22,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-09-20 18:59:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:59:22,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:22,505 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 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] [2024-09-20 18:59:22,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:22,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:59:22,709 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:22,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -475395845, now seen corresponding path program 6 times [2024-09-20 18:59:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:22,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853622457] [2024-09-20 18:59:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:22,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:22,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:22,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:22,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:59:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853622457] [2024-09-20 18:59:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853622457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951905857] [2024-09-20 18:59:23,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:59:23,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:23,030 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) [2024-09-20 18:59:23,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:59:23,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:59:23,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:23,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:59:23,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:23,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951905857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:23,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-20 18:59:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248334650] [2024-09-20 18:59:23,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:23,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:59:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:59:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:59:23,675 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:24,085 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-09-20 18:59:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:59:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-20 18:59:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:24,087 INFO L225 Difference]: With dead ends: 59 [2024-09-20 18:59:24,087 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 18:59:24,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 18:59:24,088 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:24,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 18:59:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-20 18:59:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-09-20 18:59:24,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2024-09-20 18:59:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:24,095 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-09-20 18:59:24,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:24,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-09-20 18:59:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:59:24,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:24,098 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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] [2024-09-20 18:59:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:24,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:24,301 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:24,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1149616321, now seen corresponding path program 7 times [2024-09-20 18:59:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082271827] [2024-09-20 18:59:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:24,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:24,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:24,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:59:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:24,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082271827] [2024-09-20 18:59:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082271827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184211497] [2024-09-20 18:59:24,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:59:24,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:24,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:24,633 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) [2024-09-20 18:59:24,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:59:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:24,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 18:59:24,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:24,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184211497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:25,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-20 18:59:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835890863] [2024-09-20 18:59:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:25,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 18:59:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 18:59:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 18:59:25,406 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:25,969 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-20 18:59:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 18:59:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-20 18:59:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:25,971 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:59:25,971 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 18:59:25,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 18:59:25,975 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:25,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:59:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 18:59:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-09-20 18:59:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-09-20 18:59:25,999 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 38 [2024-09-20 18:59:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:26,000 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-09-20 18:59:26,000 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:26,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-09-20 18:59:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:59:26,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:26,001 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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] [2024-09-20 18:59:26,017 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:26,201 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:26,202 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:26,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1335880383, now seen corresponding path program 7 times [2024-09-20 18:59:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118780779] [2024-09-20 18:59:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:59:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:26,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118780779] [2024-09-20 18:59:26,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118780779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919160391] [2024-09-20 18:59:26,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:59:26,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:26,537 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) [2024-09-20 18:59:26,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:59:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 18:59:26,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:26,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:27,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919160391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:27,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:27,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-20 18:59:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921857015] [2024-09-20 18:59:27,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:27,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 18:59:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 18:59:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 18:59:27,307 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:27,682 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-09-20 18:59:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 18:59:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-20 18:59:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:27,683 INFO L225 Difference]: With dead ends: 60 [2024-09-20 18:59:27,684 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 18:59:27,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 18:59:27,685 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:27,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:59:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 18:59:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 18:59:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-09-20 18:59:27,695 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2024-09-20 18:59:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:27,695 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-09-20 18:59:27,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:27,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-09-20 18:59:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 18:59:27,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:27,697 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 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] [2024-09-20 18:59:27,712 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:27,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:27,897 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:27,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:27,898 INFO L85 PathProgramCache]: Analyzing trace with hash 244399419, now seen corresponding path program 8 times [2024-09-20 18:59:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784497473] [2024-09-20 18:59:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:27,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:27,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:28,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:59:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784497473] [2024-09-20 18:59:28,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784497473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:28,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861163597] [2024-09-20 18:59:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:28,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:28,251 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) [2024-09-20 18:59:28,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:59:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:28,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 18:59:28,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:28,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:29,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861163597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:29,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:29,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-20 18:59:29,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880697237] [2024-09-20 18:59:29,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:29,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 18:59:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 18:59:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 18:59:29,011 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:29,469 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-09-20 18:59:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 18:59:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-20 18:59:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:29,470 INFO L225 Difference]: With dead ends: 67 [2024-09-20 18:59:29,470 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 18:59:29,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:59:29,472 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:29,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 18:59:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2024-09-20 18:59:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-20 18:59:29,484 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2024-09-20 18:59:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:29,484 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-20 18:59:29,484 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:29,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-20 18:59:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 18:59:29,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:29,485 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 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] [2024-09-20 18:59:29,499 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:29,689 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:29,690 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:29,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2122483680, now seen corresponding path program 8 times [2024-09-20 18:59:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:29,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454751899] [2024-09-20 18:59:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:29,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:29,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:29,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:59:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:30,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454751899] [2024-09-20 18:59:30,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454751899] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:30,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584933732] [2024-09-20 18:59:30,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:30,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:30,018 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) [2024-09-20 18:59:30,020 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:59:30,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:30,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 18:59:30,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:30,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:30,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584933732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:30,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:30,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-20 18:59:30,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449384699] [2024-09-20 18:59:30,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:30,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 18:59:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 18:59:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 18:59:30,837 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:31,276 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-09-20 18:59:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 18:59:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-20 18:59:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:31,277 INFO L225 Difference]: With dead ends: 61 [2024-09-20 18:59:31,277 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 18:59:31,278 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:59:31,279 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:31,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 18:59:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 18:59:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-09-20 18:59:31,286 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2024-09-20 18:59:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:31,286 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-09-20 18:59:31,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:31,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-09-20 18:59:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 18:59:31,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:31,287 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-09-20 18:59:31,304 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:31,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 18:59:31,491 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:31,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 694635306, now seen corresponding path program 9 times [2024-09-20 18:59:31,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:31,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062984742] [2024-09-20 18:59:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:31,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:31,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:31,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:59:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062984742] [2024-09-20 18:59:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062984742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171238618] [2024-09-20 18:59:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:31,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:31,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:31,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:59:31,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:59:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:31,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 18:59:31,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:32,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171238618] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:32,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:32,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-20 18:59:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693651353] [2024-09-20 18:59:32,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:32,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 18:59:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 18:59:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 18:59:32,893 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:33,364 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-09-20 18:59:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 18:59:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-20 18:59:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:33,366 INFO L225 Difference]: With dead ends: 67 [2024-09-20 18:59:33,366 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 18:59:33,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 18:59:33,367 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:33,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 43 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 18:59:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-20 18:59:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-09-20 18:59:33,375 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2024-09-20 18:59:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:33,375 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-09-20 18:59:33,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:33,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-09-20 18:59:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 18:59:33,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:33,376 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-09-20 18:59:33,387 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:33,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 18:59:33,576 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:33,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:33,577 INFO L85 PathProgramCache]: Analyzing trace with hash -119436570, now seen corresponding path program 9 times [2024-09-20 18:59:33,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:33,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566125106] [2024-09-20 18:59:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:33,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:33,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:33,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:59:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566125106] [2024-09-20 18:59:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566125106] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:33,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928161796] [2024-09-20 18:59:33,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:33,958 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 18:59:34,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:59:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:34,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 18:59:34,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:34,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928161796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:34,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:34,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-20 18:59:34,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19833423] [2024-09-20 18:59:34,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:34,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 18:59:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 18:59:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 18:59:34,819 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:35,291 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-09-20 18:59:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 18:59:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-20 18:59:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:35,292 INFO L225 Difference]: With dead ends: 62 [2024-09-20 18:59:35,292 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 18:59:35,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 18:59:35,293 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:35,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 18:59:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 18:59:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-09-20 18:59:35,303 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2024-09-20 18:59:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:35,308 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-09-20 18:59:35,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:35,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:35,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-09-20 18:59:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:59:35,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:35,309 INFO L216 NwaCegarLoop]: trace histogram [7, 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, 1, 1] [2024-09-20 18:59:35,323 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 18:59:35,510 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 18:59:35,510 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1635413724, now seen corresponding path program 10 times [2024-09-20 18:59:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:35,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867143624] [2024-09-20 18:59:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:35,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:35,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:35,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:59:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867143624] [2024-09-20 18:59:35,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867143624] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368324207] [2024-09-20 18:59:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:59:35,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:35,889 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:35,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 18:59:35,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:59:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:35,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:59:35,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:36,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368324207] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:36,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-20 18:59:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063033163] [2024-09-20 18:59:36,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:36,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 18:59:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 18:59:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:59:36,636 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:37,112 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2024-09-20 18:59:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 18:59:37,112 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-20 18:59:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:37,113 INFO L225 Difference]: With dead ends: 69 [2024-09-20 18:59:37,113 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 18:59:37,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 18:59:37,114 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:37,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 18:59:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-09-20 18:59:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-20 18:59:37,125 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2024-09-20 18:59:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:37,125 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-20 18:59:37,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:37,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-20 18:59:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:59:37,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:37,126 INFO L216 NwaCegarLoop]: trace histogram [7, 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, 1, 1] [2024-09-20 18:59:37,140 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:37,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 18:59:37,330 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:37,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1227536155, now seen corresponding path program 10 times [2024-09-20 18:59:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389745067] [2024-09-20 18:59:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:37,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:37,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:37,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:59:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389745067] [2024-09-20 18:59:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389745067] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227304669] [2024-09-20 18:59:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:59:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:37,673 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:37,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 18:59:37,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:59:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:37,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:59:37,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:38,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:38,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227304669] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:38,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:38,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-20 18:59:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656454428] [2024-09-20 18:59:38,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:38,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 18:59:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 18:59:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:59:38,614 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:39,073 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-09-20 18:59:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 18:59:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-20 18:59:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:39,075 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:59:39,075 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 18:59:39,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 18:59:39,076 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:39,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 18:59:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 18:59:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-20 18:59:39,086 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2024-09-20 18:59:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:39,086 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-20 18:59:39,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:39,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-20 18:59:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:59:39,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:39,087 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 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] [2024-09-20 18:59:39,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 18:59:39,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 18:59:39,288 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:39,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1744997279, now seen corresponding path program 11 times [2024-09-20 18:59:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:39,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249753992] [2024-09-20 18:59:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:39,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:39,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:39,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:59:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:39,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249753992] [2024-09-20 18:59:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249753992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054640444] [2024-09-20 18:59:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:59:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:39,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:39,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 18:59:39,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 18:59:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:39,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 18:59:39,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:40,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:40,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054640444] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:40,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:40,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-20 18:59:40,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813901094] [2024-09-20 18:59:40,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:40,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 18:59:40,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 18:59:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 18:59:40,727 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:41,256 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-09-20 18:59:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:59:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-20 18:59:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:41,257 INFO L225 Difference]: With dead ends: 69 [2024-09-20 18:59:41,257 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 18:59:41,258 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 18:59:41,258 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:41,258 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 18:59:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-20 18:59:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-09-20 18:59:41,269 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 42 [2024-09-20 18:59:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:41,269 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-09-20 18:59:41,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:41,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-09-20 18:59:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:59:41,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:41,270 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 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] [2024-09-20 18:59:41,284 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:41,471 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 18:59:41,471 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:41,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2010460257, now seen corresponding path program 11 times [2024-09-20 18:59:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:41,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332815907] [2024-09-20 18:59:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:41,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:41,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:41,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:59:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332815907] [2024-09-20 18:59:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332815907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248655749] [2024-09-20 18:59:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:59:41,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:41,884 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:41,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 18:59:41,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 18:59:41,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:41,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 18:59:41,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:42,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248655749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:42,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-20 18:59:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454276738] [2024-09-20 18:59:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:42,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 18:59:42,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 18:59:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 18:59:42,825 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:43,393 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-09-20 18:59:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:59:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-20 18:59:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:43,394 INFO L225 Difference]: With dead ends: 64 [2024-09-20 18:59:43,394 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 18:59:43,395 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 18:59:43,395 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:43,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 18:59:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-20 18:59:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-09-20 18:59:43,405 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2024-09-20 18:59:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:43,405 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-09-20 18:59:43,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:43,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-09-20 18:59:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:59:43,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:43,406 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 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] [2024-09-20 18:59:43,419 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:43,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 18:59:43,607 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:43,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1050813403, now seen corresponding path program 12 times [2024-09-20 18:59:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730130704] [2024-09-20 18:59:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:43,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:43,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:43,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:59:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730130704] [2024-09-20 18:59:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730130704] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216369041] [2024-09-20 18:59:43,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:59:43,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:43,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:43,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:43,992 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 18:59:44,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:59:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:44,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 18:59:44,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:44,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:44,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216369041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:44,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:44,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-20 18:59:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004694863] [2024-09-20 18:59:44,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:44,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 18:59:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 18:59:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:59:44,845 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:45,472 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-09-20 18:59:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:59:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-20 18:59:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:45,473 INFO L225 Difference]: With dead ends: 71 [2024-09-20 18:59:45,473 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 18:59:45,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 18:59:45,475 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:45,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:59:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 18:59:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-09-20 18:59:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-09-20 18:59:45,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2024-09-20 18:59:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:45,487 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-09-20 18:59:45,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:45,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-09-20 18:59:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:59:45,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:45,488 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 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] [2024-09-20 18:59:45,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:45,689 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:45,689 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:45,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1465138944, now seen corresponding path program 12 times [2024-09-20 18:59:45,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399452272] [2024-09-20 18:59:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:45,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:45,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:45,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:45,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:59:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:46,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:46,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399452272] [2024-09-20 18:59:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399452272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:46,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33680631] [2024-09-20 18:59:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:59:46,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:46,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:46,039 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:46,040 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 18:59:46,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:59:46,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:46,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 18:59:46,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:46,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33680631] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:46,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-20 18:59:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454078801] [2024-09-20 18:59:46,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:46,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 18:59:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 18:59:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:59:46,925 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:47,418 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-09-20 18:59:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:59:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-20 18:59:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:47,419 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:59:47,419 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 18:59:47,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 18:59:47,421 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:47,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 18:59:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 18:59:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-09-20 18:59:47,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2024-09-20 18:59:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:47,429 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-09-20 18:59:47,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-09-20 18:59:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 18:59:47,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:47,430 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 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] [2024-09-20 18:59:47,445 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:47,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:47,631 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -76334966, now seen corresponding path program 13 times [2024-09-20 18:59:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341812849] [2024-09-20 18:59:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:47,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:47,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:47,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:59:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:48,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:48,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341812849] [2024-09-20 18:59:48,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341812849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:48,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892246161] [2024-09-20 18:59:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:59:48,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:48,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:48,013 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:48,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 18:59:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:48,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 18:59:48,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:48,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:49,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892246161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:49,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-20 18:59:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289306903] [2024-09-20 18:59:49,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:49,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 18:59:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 18:59:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:59:49,097 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:49,723 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-09-20 18:59:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:59:49,724 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-20 18:59:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:49,724 INFO L225 Difference]: With dead ends: 71 [2024-09-20 18:59:49,724 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 18:59:49,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 18:59:49,726 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:49,726 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:59:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 18:59:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-09-20 18:59:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-09-20 18:59:49,743 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2024-09-20 18:59:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:49,744 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-09-20 18:59:49,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:49,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-09-20 18:59:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 18:59:49,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:49,746 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 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] [2024-09-20 18:59:49,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:49,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:49,947 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash -694353722, now seen corresponding path program 13 times [2024-09-20 18:59:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:49,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599909545] [2024-09-20 18:59:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:50,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:50,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:50,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:59:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599909545] [2024-09-20 18:59:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599909545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421441737] [2024-09-20 18:59:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:59:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:50,369 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 18:59:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:50,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 18:59:50,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:50,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421441737] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:51,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:51,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-20 18:59:51,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631156674] [2024-09-20 18:59:51,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:51,401 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 18:59:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 18:59:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:59:51,402 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:51,989 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-09-20 18:59:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:59:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-20 18:59:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:51,990 INFO L225 Difference]: With dead ends: 66 [2024-09-20 18:59:51,990 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 18:59:51,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 18:59:51,991 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:51,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 18:59:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 18:59:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-09-20 18:59:52,004 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2024-09-20 18:59:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:52,004 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-09-20 18:59:52,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-09-20 18:59:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 18:59:52,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:52,006 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 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] [2024-09-20 18:59:52,022 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:52,206 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 18:59:52,206 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:52,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1951796860, now seen corresponding path program 14 times [2024-09-20 18:59:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457423568] [2024-09-20 18:59:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:52,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:52,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:52,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:59:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457423568] [2024-09-20 18:59:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457423568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344278833] [2024-09-20 18:59:52,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:52,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:52,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:52,602 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:52,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 18:59:52,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:52,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:59:52,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:52,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344278833] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:53,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:53,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-20 18:59:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369703141] [2024-09-20 18:59:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:53,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 18:59:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 18:59:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 18:59:53,560 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:54,137 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-09-20 18:59:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:59:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-20 18:59:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:54,138 INFO L225 Difference]: With dead ends: 73 [2024-09-20 18:59:54,138 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 18:59:54,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3589 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 18:59:54,140 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:54,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:59:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 18:59:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-09-20 18:59:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-09-20 18:59:54,150 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 45 [2024-09-20 18:59:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:54,150 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-09-20 18:59:54,150 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:54,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-09-20 18:59:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 18:59:54,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:54,151 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 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] [2024-09-20 18:59:54,163 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-20 18:59:54,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 18:59:54,352 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:54,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 584973627, now seen corresponding path program 14 times [2024-09-20 18:59:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:54,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367243995] [2024-09-20 18:59:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:54,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:54,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:54,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:59:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:54,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:54,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367243995] [2024-09-20 18:59:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367243995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:54,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151332731] [2024-09-20 18:59:54,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:59:54,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:54,759 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:54,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 18:59:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:59:54,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:54,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:59:54,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:55,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151332731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:55,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-20 18:59:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115183915] [2024-09-20 18:59:55,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:55,802 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 18:59:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 18:59:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 18:59:55,803 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:56,411 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-09-20 18:59:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:59:56,412 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-20 18:59:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:56,412 INFO L225 Difference]: With dead ends: 67 [2024-09-20 18:59:56,412 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 18:59:56,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 18:59:56,414 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:56,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:59:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 18:59:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-20 18:59:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-09-20 18:59:56,427 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 45 [2024-09-20 18:59:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:56,427 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-09-20 18:59:56,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:56,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-09-20 18:59:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:59:56,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:56,428 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 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] [2024-09-20 18:59:56,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-20 18:59:56,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-20 18:59:56,629 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:56,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1332027393, now seen corresponding path program 15 times [2024-09-20 18:59:56,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:56,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680004631] [2024-09-20 18:59:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:56,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:56,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:56,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:59:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680004631] [2024-09-20 18:59:57,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680004631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213953735] [2024-09-20 18:59:57,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:57,066 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:57,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 18:59:57,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:59:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:57,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 18:59:57,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:57,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213953735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:58,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:58,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-20 18:59:58,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676125932] [2024-09-20 18:59:58,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:58,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 18:59:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 18:59:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 18:59:58,252 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:58,926 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-09-20 18:59:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:59:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-20 18:59:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:58,927 INFO L225 Difference]: With dead ends: 73 [2024-09-20 18:59:58,927 INFO L226 Difference]: Without dead ends: 62 [2024-09-20 18:59:58,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 18:59:58,929 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:58,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:59:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-20 18:59:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-09-20 18:59:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 18:59:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-09-20 18:59:58,940 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 46 [2024-09-20 18:59:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:58,940 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-09-20 18:59:58,941 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:59:58,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-09-20 18:59:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:59:58,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:58,942 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 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] [2024-09-20 18:59:58,958 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:59,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 18:59:59,142 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:59,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1719770239, now seen corresponding path program 15 times [2024-09-20 18:59:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099194343] [2024-09-20 18:59:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:59,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:59,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:59:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:59,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:59:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:59:59,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:59,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099194343] [2024-09-20 18:59:59,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099194343] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:59,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542724824] [2024-09-20 18:59:59,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:59:59,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:59,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:59,640 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:59,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 18:59:59,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:59:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:59,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 18:59:59,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:00,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:00,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542724824] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:00,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-20 19:00:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197512358] [2024-09-20 19:00:00,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:00,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 19:00:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 19:00:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 19:00:00,891 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:01,562 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-09-20 19:00:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:00:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-20 19:00:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:01,563 INFO L225 Difference]: With dead ends: 68 [2024-09-20 19:00:01,563 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 19:00:01,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 19:00:01,564 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:01,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 19:00:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-20 19:00:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-09-20 19:00:01,576 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 46 [2024-09-20 19:00:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:01,576 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-09-20 19:00:01,577 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-09-20 19:00:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 19:00:01,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:01,577 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 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] [2024-09-20 19:00:01,589 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-20 19:00:01,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 19:00:01,778 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1395555717, now seen corresponding path program 16 times [2024-09-20 19:00:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222346752] [2024-09-20 19:00:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:01,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:01,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:02,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 19:00:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:02,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222346752] [2024-09-20 19:00:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222346752] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8312691] [2024-09-20 19:00:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:00:02,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:02,246 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:02,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 19:00:02,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:00:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:02,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:00:02,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:02,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:03,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8312691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:03,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-20 19:00:03,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259872447] [2024-09-20 19:00:03,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:03,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 19:00:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 19:00:03,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 19:00:03,316 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:03,933 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-09-20 19:00:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:00:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-20 19:00:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:03,934 INFO L225 Difference]: With dead ends: 75 [2024-09-20 19:00:03,934 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:00:03,935 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 19:00:03,935 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:03,935 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:00:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-09-20 19:00:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-09-20 19:00:03,950 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 47 [2024-09-20 19:00:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:03,950 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-09-20 19:00:03,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:03,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-09-20 19:00:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 19:00:03,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:03,951 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 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] [2024-09-20 19:00:03,966 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:04,152 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 19:00:04,152 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:04,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1138167328, now seen corresponding path program 16 times [2024-09-20 19:00:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180138483] [2024-09-20 19:00:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:04,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:04,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:04,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 19:00:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:04,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180138483] [2024-09-20 19:00:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180138483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8855745] [2024-09-20 19:00:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:00:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:04,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:04,560 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:04,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-20 19:00:04,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:00:04,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:04,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:00:04,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:05,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8855745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:05,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-20 19:00:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692246625] [2024-09-20 19:00:05,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:05,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 19:00:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 19:00:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 19:00:05,677 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:06,244 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2024-09-20 19:00:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:00:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-20 19:00:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:06,245 INFO L225 Difference]: With dead ends: 69 [2024-09-20 19:00:06,245 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 19:00:06,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 19:00:06,246 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:06,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 19:00:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 19:00:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-09-20 19:00:06,260 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2024-09-20 19:00:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:06,260 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-09-20 19:00:06,261 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:06,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-09-20 19:00:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 19:00:06,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:06,262 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 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] [2024-09-20 19:00:06,274 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:06,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-20 19:00:06,463 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:06,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1395633642, now seen corresponding path program 17 times [2024-09-20 19:00:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280986482] [2024-09-20 19:00:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:06,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:06,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:06,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 19:00:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280986482] [2024-09-20 19:00:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280986482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242267740] [2024-09-20 19:00:06,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:00:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:06,974 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:06,975 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-20 19:00:07,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:00:07,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:07,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:00:07,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:07,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242267740] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:08,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:08,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-20 19:00:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729340096] [2024-09-20 19:00:08,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:08,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-20 19:00:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-20 19:00:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 19:00:08,300 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:08,953 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-09-20 19:00:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 19:00:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-20 19:00:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:08,954 INFO L225 Difference]: With dead ends: 75 [2024-09-20 19:00:08,954 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 19:00:08,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 19:00:08,955 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:08,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 19:00:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-20 19:00:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-09-20 19:00:08,965 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2024-09-20 19:00:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:08,966 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-09-20 19:00:08,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:08,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-09-20 19:00:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 19:00:08,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:08,966 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 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] [2024-09-20 19:00:08,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-20 19:00:09,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-20 19:00:09,167 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:09,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash 206102182, now seen corresponding path program 17 times [2024-09-20 19:00:09,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:09,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496382179] [2024-09-20 19:00:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:09,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:09,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:09,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:09,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 19:00:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:09,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496382179] [2024-09-20 19:00:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496382179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:09,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387642115] [2024-09-20 19:00:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:00:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:09,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:09,660 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-20 19:00:09,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:00:09,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:09,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:00:09,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:10,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387642115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:10,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-20 19:00:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017713123] [2024-09-20 19:00:10,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:10,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-20 19:00:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-20 19:00:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 19:00:10,947 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:11,601 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-09-20 19:00:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 19:00:11,602 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-20 19:00:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:11,603 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:00:11,603 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:00:11,603 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 19:00:11,604 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:11,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:00:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-20 19:00:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-09-20 19:00:11,616 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 48 [2024-09-20 19:00:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:11,616 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-09-20 19:00:11,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:11,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-09-20 19:00:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:00:11,616 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:11,617 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 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] [2024-09-20 19:00:11,629 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:11,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:11,817 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:11,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 118315492, now seen corresponding path program 18 times [2024-09-20 19:00:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:11,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430734788] [2024-09-20 19:00:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:11,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:11,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:12,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:00:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:12,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430734788] [2024-09-20 19:00:12,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430734788] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824554819] [2024-09-20 19:00:12,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:00:12,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:12,225 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:12,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-20 19:00:12,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 19:00:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:12,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:00:12,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:12,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:13,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824554819] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:13,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:13,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-20 19:00:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624850822] [2024-09-20 19:00:13,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:13,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-20 19:00:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-20 19:00:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 19:00:13,443 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:14,056 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-09-20 19:00:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 19:00:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-20 19:00:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:14,057 INFO L225 Difference]: With dead ends: 77 [2024-09-20 19:00:14,057 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 19:00:14,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 19:00:14,059 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:14,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 19:00:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-09-20 19:00:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-09-20 19:00:14,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2024-09-20 19:00:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:14,073 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-09-20 19:00:14,073 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:14,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-09-20 19:00:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:00:14,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:14,074 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 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] [2024-09-20 19:00:14,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:14,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:14,274 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:14,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1565664421, now seen corresponding path program 18 times [2024-09-20 19:00:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:14,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111183493] [2024-09-20 19:00:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:14,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:14,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:14,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 19:00:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:14,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111183493] [2024-09-20 19:00:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111183493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23695167] [2024-09-20 19:00:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:00:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:14,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:14,677 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:14,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-20 19:00:14,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 19:00:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:14,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:00:14,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:15,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23695167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:15,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:15,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-20 19:00:15,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176232054] [2024-09-20 19:00:15,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:15,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-20 19:00:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-20 19:00:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 19:00:15,946 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:16,581 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-09-20 19:00:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 19:00:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-20 19:00:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:16,582 INFO L225 Difference]: With dead ends: 71 [2024-09-20 19:00:16,582 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 19:00:16,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 19:00:16,584 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:16,585 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 19:00:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-20 19:00:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-09-20 19:00:16,600 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2024-09-20 19:00:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:16,600 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-09-20 19:00:16,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:16,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-09-20 19:00:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:00:16,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:16,602 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 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] [2024-09-20 19:00:16,617 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-20 19:00:16,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:16,802 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:16,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1081000865, now seen corresponding path program 19 times [2024-09-20 19:00:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:16,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204101454] [2024-09-20 19:00:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:16,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:16,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:16,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:17,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:00:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204101454] [2024-09-20 19:00:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204101454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330025036] [2024-09-20 19:00:17,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:00:17,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:17,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:17,233 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:17,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-20 19:00:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:17,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 19:00:17,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:17,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:18,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330025036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:18,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:18,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-20 19:00:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956192777] [2024-09-20 19:00:18,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:18,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-20 19:00:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-20 19:00:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 19:00:18,727 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:19,501 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2024-09-20 19:00:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 19:00:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-20 19:00:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:19,502 INFO L225 Difference]: With dead ends: 77 [2024-09-20 19:00:19,502 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 19:00:19,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-20 19:00:19,504 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:19,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 19:00:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-09-20 19:00:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-09-20 19:00:19,522 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 50 [2024-09-20 19:00:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:19,522 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-09-20 19:00:19,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:19,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-09-20 19:00:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:00:19,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:19,523 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 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] [2024-09-20 19:00:19,535 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:19,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-20 19:00:19,723 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:19,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1787145889, now seen corresponding path program 19 times [2024-09-20 19:00:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:19,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000820788] [2024-09-20 19:00:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:19,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:19,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:19,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:00:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:20,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:20,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000820788] [2024-09-20 19:00:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000820788] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482232206] [2024-09-20 19:00:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:00:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:20,196 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-20 19:00:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:20,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 19:00:20,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:20,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482232206] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:21,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:21,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-20 19:00:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822197003] [2024-09-20 19:00:21,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:21,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-20 19:00:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-20 19:00:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 19:00:21,619 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:22,405 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-09-20 19:00:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 19:00:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-20 19:00:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:22,407 INFO L225 Difference]: With dead ends: 72 [2024-09-20 19:00:22,407 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:00:22,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-20 19:00:22,408 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:22,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:00:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 19:00:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-20 19:00:22,425 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 50 [2024-09-20 19:00:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:22,425 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-20 19:00:22,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:22,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-20 19:00:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 19:00:22,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:22,426 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 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] [2024-09-20 19:00:22,443 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:22,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-20 19:00:22,627 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1938905371, now seen corresponding path program 20 times [2024-09-20 19:00:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506173833] [2024-09-20 19:00:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:22,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:22,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:22,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:00:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506173833] [2024-09-20 19:00:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506173833] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480782799] [2024-09-20 19:00:23,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:00:23,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:23,091 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:23,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-20 19:00:23,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:00:23,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:23,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:00:23,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:23,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480782799] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:24,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:24,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-20 19:00:24,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9564529] [2024-09-20 19:00:24,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:24,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 19:00:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 19:00:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 19:00:24,531 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:25,244 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-20 19:00:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 19:00:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-20 19:00:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:25,245 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:00:25,245 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:00:25,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5974 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 19:00:25,247 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:25,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:00:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-20 19:00:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-09-20 19:00:25,263 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2024-09-20 19:00:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:25,263 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-09-20 19:00:25,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:25,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-09-20 19:00:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 19:00:25,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:25,264 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 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] [2024-09-20 19:00:25,276 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:25,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:25,465 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:25,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash 202050240, now seen corresponding path program 20 times [2024-09-20 19:00:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726461549] [2024-09-20 19:00:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:25,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:25,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:25,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:00:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:25,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:25,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726461549] [2024-09-20 19:00:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726461549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:25,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765650566] [2024-09-20 19:00:25,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:00:25,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:25,880 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:25,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-20 19:00:25,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:00:25,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:25,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:00:25,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:26,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765650566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:27,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:27,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-20 19:00:27,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502913735] [2024-09-20 19:00:27,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:27,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 19:00:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 19:00:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 19:00:27,275 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:27,972 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2024-09-20 19:00:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 19:00:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-20 19:00:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:27,973 INFO L225 Difference]: With dead ends: 73 [2024-09-20 19:00:27,973 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:00:27,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 19:00:27,975 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:27,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:00:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-20 19:00:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-09-20 19:00:27,991 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 51 [2024-09-20 19:00:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:27,991 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-09-20 19:00:27,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:27,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-09-20 19:00:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 19:00:27,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:27,992 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 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] [2024-09-20 19:00:28,009 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:28,193 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:28,193 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:28,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1684712266, now seen corresponding path program 21 times [2024-09-20 19:00:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065824497] [2024-09-20 19:00:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:28,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:28,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:28,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:00:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:28,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:28,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065824497] [2024-09-20 19:00:28,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065824497] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:28,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869880633] [2024-09-20 19:00:28,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:00:28,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:28,689 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:28,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-20 19:00:28,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 19:00:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:28,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 19:00:28,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:29,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:30,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869880633] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:30,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:30,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-20 19:00:30,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407189083] [2024-09-20 19:00:30,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:30,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-20 19:00:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-20 19:00:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 19:00:30,408 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:31,296 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2024-09-20 19:00:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:00:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-20 19:00:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:31,297 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:00:31,297 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 19:00:31,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6906 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 19:00:31,298 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:31,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 19:00:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-09-20 19:00:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-09-20 19:00:31,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 52 [2024-09-20 19:00:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:31,314 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-09-20 19:00:31,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:31,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-09-20 19:00:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 19:00:31,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:31,315 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 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] [2024-09-20 19:00:31,327 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:31,515 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-20 19:00:31,515 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:31,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1027286150, now seen corresponding path program 21 times [2024-09-20 19:00:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816002036] [2024-09-20 19:00:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:31,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:31,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:31,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:00:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:32,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816002036] [2024-09-20 19:00:32,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816002036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093139796] [2024-09-20 19:00:32,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:00:32,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:32,071 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:32,072 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-20 19:00:32,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 19:00:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:32,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 19:00:32,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:32,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:33,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093139796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:33,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-20 19:00:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810914264] [2024-09-20 19:00:33,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:33,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-20 19:00:33,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-20 19:00:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 19:00:33,665 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:34,450 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-09-20 19:00:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:00:34,451 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-20 19:00:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:34,451 INFO L225 Difference]: With dead ends: 74 [2024-09-20 19:00:34,451 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:00:34,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 19:00:34,453 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:34,453 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:00:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-20 19:00:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-09-20 19:00:34,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 52 [2024-09-20 19:00:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:34,472 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-09-20 19:00:34,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:34,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-09-20 19:00:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:00:34,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:34,473 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 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] [2024-09-20 19:00:34,490 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:34,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-20 19:00:34,674 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:34,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1497221700, now seen corresponding path program 22 times [2024-09-20 19:00:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507213764] [2024-09-20 19:00:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:34,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:34,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:34,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:00:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507213764] [2024-09-20 19:00:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507213764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736745077] [2024-09-20 19:00:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:00:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:35,201 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:35,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-20 19:00:35,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:00:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:35,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 19:00:35,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:35,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736745077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:36,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:36,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-20 19:00:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495303138] [2024-09-20 19:00:36,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:36,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-20 19:00:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-20 19:00:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 19:00:36,714 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:37,535 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-09-20 19:00:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:00:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-20 19:00:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:37,536 INFO L225 Difference]: With dead ends: 81 [2024-09-20 19:00:37,536 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 19:00:37,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-20 19:00:37,537 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:37,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 19:00:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-09-20 19:00:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-09-20 19:00:37,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2024-09-20 19:00:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:37,551 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-09-20 19:00:37,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:37,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-09-20 19:00:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:00:37,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:37,552 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 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] [2024-09-20 19:00:37,564 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:37,752 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-20 19:00:37,753 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:37,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1878765189, now seen corresponding path program 22 times [2024-09-20 19:00:37,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:37,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484444338] [2024-09-20 19:00:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:37,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:37,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:38,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:00:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484444338] [2024-09-20 19:00:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484444338] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381462210] [2024-09-20 19:00:38,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:00:38,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:38,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:38,235 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-20 19:00:38,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:00:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:38,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 19:00:38,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:38,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:39,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381462210] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:39,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:39,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-20 19:00:39,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097083104] [2024-09-20 19:00:39,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:39,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-20 19:00:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-20 19:00:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 19:00:39,884 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:40,624 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2024-09-20 19:00:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:00:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-20 19:00:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:40,626 INFO L225 Difference]: With dead ends: 75 [2024-09-20 19:00:40,626 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:00:40,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6939 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-20 19:00:40,627 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:40,627 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:00:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 19:00:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-09-20 19:00:40,639 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 53 [2024-09-20 19:00:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:40,639 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-09-20 19:00:40,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:40,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-09-20 19:00:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 19:00:40,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:40,640 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 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] [2024-09-20 19:00:40,654 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-20 19:00:40,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:40,840 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:40,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 877420353, now seen corresponding path program 23 times [2024-09-20 19:00:40,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:40,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692905262] [2024-09-20 19:00:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:40,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:40,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:40,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:41,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:00:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692905262] [2024-09-20 19:00:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692905262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696377218] [2024-09-20 19:00:41,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:00:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:41,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:41,456 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:41,457 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-20 19:00:41,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 19:00:41,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:41,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:00:41,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:42,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696377218] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:43,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:43,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-20 19:00:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647254301] [2024-09-20 19:00:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:43,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-20 19:00:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-20 19:00:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 19:00:43,295 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:44,159 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-09-20 19:00:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 19:00:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-20 19:00:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:44,160 INFO L225 Difference]: With dead ends: 81 [2024-09-20 19:00:44,161 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 19:00:44,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 19:00:44,162 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:44,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 19:00:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-20 19:00:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-09-20 19:00:44,177 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 54 [2024-09-20 19:00:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:44,177 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-09-20 19:00:44,177 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:44,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-09-20 19:00:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 19:00:44,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:44,178 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 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] [2024-09-20 19:00:44,190 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:44,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:44,378 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:44,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash 898961857, now seen corresponding path program 23 times [2024-09-20 19:00:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:44,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5323509] [2024-09-20 19:00:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:44,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:44,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:44,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:44,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:00:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5323509] [2024-09-20 19:00:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5323509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568234566] [2024-09-20 19:00:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:00:44,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:44,953 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:44,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-20 19:00:45,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 19:00:45,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:45,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:00:45,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:45,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:46,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568234566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:46,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:46,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-20 19:00:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826216361] [2024-09-20 19:00:46,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:46,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-20 19:00:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-20 19:00:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 19:00:46,701 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:47,573 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2024-09-20 19:00:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 19:00:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-20 19:00:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:47,574 INFO L225 Difference]: With dead ends: 76 [2024-09-20 19:00:47,574 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 19:00:47,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7931 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 19:00:47,575 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:47,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 19:00:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-20 19:00:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-09-20 19:00:47,589 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 54 [2024-09-20 19:00:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:47,589 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-09-20 19:00:47,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:47,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-09-20 19:00:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:00:47,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:47,590 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 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] [2024-09-20 19:00:47,602 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-20 19:00:47,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:47,790 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:47,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1087612859, now seen corresponding path program 24 times [2024-09-20 19:00:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741342094] [2024-09-20 19:00:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:47,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:47,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:48,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:00:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:48,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:48,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741342094] [2024-09-20 19:00:48,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741342094] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:48,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014310923] [2024-09-20 19:00:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:00:48,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:48,419 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:48,420 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-20 19:00:48,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-20 19:00:48,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:48,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 19:00:48,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:49,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:50,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014310923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:50,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:50,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-20 19:00:50,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783692644] [2024-09-20 19:00:50,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:50,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-20 19:00:50,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:50,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-20 19:00:50,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 19:00:50,098 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:50,992 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-09-20 19:00:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 19:00:50,993 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-20 19:00:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:50,993 INFO L225 Difference]: With dead ends: 83 [2024-09-20 19:00:50,993 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 19:00:50,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-20 19:00:50,994 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:50,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 58 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 19:00:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-09-20 19:00:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-09-20 19:00:51,015 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2024-09-20 19:00:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:51,015 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-09-20 19:00:51,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:51,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-09-20 19:00:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:00:51,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:51,016 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 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] [2024-09-20 19:00:51,031 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-20 19:00:51,216 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-20 19:00:51,217 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:51,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1561850976, now seen corresponding path program 24 times [2024-09-20 19:00:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384817459] [2024-09-20 19:00:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:51,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:51,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:51,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:00:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:51,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:51,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384817459] [2024-09-20 19:00:51,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384817459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:51,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873210727] [2024-09-20 19:00:51,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:00:51,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:51,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:51,734 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:51,735 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-20 19:00:51,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-20 19:00:51,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:51,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 19:00:51,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:52,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873210727] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:53,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-20 19:00:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354289733] [2024-09-20 19:00:53,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:53,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-20 19:00:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-20 19:00:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 19:00:53,447 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:54,317 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-09-20 19:00:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 19:00:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-20 19:00:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:54,318 INFO L225 Difference]: With dead ends: 77 [2024-09-20 19:00:54,318 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:00:54,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7864 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-20 19:00:54,321 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:54,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:00:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:00:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-20 19:00:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-09-20 19:00:54,336 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2024-09-20 19:00:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:54,336 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-09-20 19:00:54,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:54,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-09-20 19:00:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 19:00:54,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:54,337 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 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] [2024-09-20 19:00:54,355 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-20 19:00:54,537 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-20 19:00:54,538 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:54,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1064448170, now seen corresponding path program 25 times [2024-09-20 19:00:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:54,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943002397] [2024-09-20 19:00:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:54,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:54,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:54,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:00:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943002397] [2024-09-20 19:00:55,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943002397] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416381407] [2024-09-20 19:00:55,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:00:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:55,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:55,172 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:55,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-20 19:00:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:55,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 19:00:55,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:55,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416381407] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:57,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:57,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-20 19:00:57,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457918753] [2024-09-20 19:00:57,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:57,164 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-20 19:00:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-20 19:00:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 19:00:57,166 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:58,071 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-20 19:00:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:00:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-20 19:00:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:58,072 INFO L225 Difference]: With dead ends: 83 [2024-09-20 19:00:58,072 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 19:00:58,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8967 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-20 19:00:58,081 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:58,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:00:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 19:00:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-09-20 19:00:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:00:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-09-20 19:00:58,094 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 56 [2024-09-20 19:00:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:58,095 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-09-20 19:00:58,095 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:00:58,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-09-20 19:00:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 19:00:58,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:58,095 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 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] [2024-09-20 19:00:58,108 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-20 19:00:58,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:58,296 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:58,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 659149414, now seen corresponding path program 25 times [2024-09-20 19:00:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457781863] [2024-09-20 19:00:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:58,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:58,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:00:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:58,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:00:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:58,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457781863] [2024-09-20 19:00:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457781863] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344023650] [2024-09-20 19:00:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:00:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:58,913 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:58,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-20 19:00:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:59,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 19:00:59,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:00:59,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344023650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:00,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-20 19:01:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602263846] [2024-09-20 19:01:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:00,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-20 19:01:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-20 19:01:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 19:01:00,908 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:01,857 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2024-09-20 19:01:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:01:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-20 19:01:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:01,858 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:01:01,858 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:01:01,859 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-20 19:01:01,859 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:01,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:01:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 19:01:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-09-20 19:01:01,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 56 [2024-09-20 19:01:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:01,874 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-09-20 19:01:01,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:01,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-09-20 19:01:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 19:01:01,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:01,874 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 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] [2024-09-20 19:01:01,887 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:02,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:02,075 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:02,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1195983524, now seen corresponding path program 26 times [2024-09-20 19:01:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108498814] [2024-09-20 19:01:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:02,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:02,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:02,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:01:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:02,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108498814] [2024-09-20 19:01:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108498814] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124182731] [2024-09-20 19:01:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:01:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:02,680 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-20 19:01:02,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:01:02,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:02,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:01:02,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:03,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124182731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:04,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-20 19:01:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061864354] [2024-09-20 19:01:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:04,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 19:01:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 19:01:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-20 19:01:04,556 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:05,468 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-09-20 19:01:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:01:05,468 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-20 19:01:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:05,469 INFO L225 Difference]: With dead ends: 85 [2024-09-20 19:01:05,469 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 19:01:05,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8930 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 19:01:05,470 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:05,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 19:01:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2024-09-20 19:01:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-09-20 19:01:05,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2024-09-20 19:01:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:05,485 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-09-20 19:01:05,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:05,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-09-20 19:01:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 19:01:05,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:05,486 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 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] [2024-09-20 19:01:05,499 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:05,686 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-20 19:01:05,686 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:05,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -406102117, now seen corresponding path program 26 times [2024-09-20 19:01:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396918267] [2024-09-20 19:01:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:05,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:05,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:05,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:01:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:06,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396918267] [2024-09-20 19:01:06,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396918267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664489878] [2024-09-20 19:01:06,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:01:06,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:06,205 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:06,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-20 19:01:06,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:01:06,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:06,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:01:06,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:06,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664489878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:08,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-20 19:01:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991454425] [2024-09-20 19:01:08,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:08,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 19:01:08,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 19:01:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-20 19:01:08,116 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:08,985 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2024-09-20 19:01:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:01:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-20 19:01:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:08,986 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:01:08,986 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 19:01:08,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8925 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 19:01:08,988 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:08,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 19:01:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-20 19:01:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2024-09-20 19:01:09,010 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2024-09-20 19:01:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:09,010 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2024-09-20 19:01:09,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2024-09-20 19:01:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 19:01:09,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:09,011 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 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] [2024-09-20 19:01:09,028 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:09,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-20 19:01:09,216 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 128971489, now seen corresponding path program 27 times [2024-09-20 19:01:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748006823] [2024-09-20 19:01:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:09,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:09,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:09,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:01:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:09,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748006823] [2024-09-20 19:01:09,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748006823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286354068] [2024-09-20 19:01:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:01:09,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:09,781 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:09,782 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-20 19:01:09,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 19:01:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:09,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 19:01:09,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:10,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286354068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:11,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-20 19:01:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789579008] [2024-09-20 19:01:11,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:11,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 19:01:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 19:01:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 19:01:11,950 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:12,908 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-09-20 19:01:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 19:01:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-20 19:01:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:12,909 INFO L225 Difference]: With dead ends: 85 [2024-09-20 19:01:12,909 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 19:01:12,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10180 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-20 19:01:12,911 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:12,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 19:01:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-09-20 19:01:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-09-20 19:01:12,925 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2024-09-20 19:01:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:12,925 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-09-20 19:01:12,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:12,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-09-20 19:01:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 19:01:12,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:12,926 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 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] [2024-09-20 19:01:12,937 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:13,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-20 19:01:13,126 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:13,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash -623473439, now seen corresponding path program 27 times [2024-09-20 19:01:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182080520] [2024-09-20 19:01:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:13,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:13,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:13,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:01:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:13,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:13,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182080520] [2024-09-20 19:01:13,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182080520] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:13,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068018970] [2024-09-20 19:01:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:01:13,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:13,897 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:13,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-20 19:01:14,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 19:01:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:14,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 19:01:14,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:14,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068018970] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:15,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:15,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-20 19:01:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991043561] [2024-09-20 19:01:15,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:15,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 19:01:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 19:01:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 19:01:15,976 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:16,971 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2024-09-20 19:01:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 19:01:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-20 19:01:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:16,972 INFO L225 Difference]: With dead ends: 80 [2024-09-20 19:01:16,972 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 19:01:16,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10163 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-20 19:01:16,974 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:16,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 19:01:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-20 19:01:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 61 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-09-20 19:01:16,997 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2024-09-20 19:01:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:16,997 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-09-20 19:01:16,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:16,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-09-20 19:01:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 19:01:16,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:16,998 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 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] [2024-09-20 19:01:17,016 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:17,199 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-20 19:01:17,199 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:17,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1980395099, now seen corresponding path program 28 times [2024-09-20 19:01:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172302811] [2024-09-20 19:01:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:17,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:17,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:17,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:01:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:17,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172302811] [2024-09-20 19:01:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172302811] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629028384] [2024-09-20 19:01:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:01:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:17,874 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:17,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-20 19:01:18,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:01:18,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:18,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 19:01:18,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:18,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629028384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:19,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:19,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-20 19:01:19,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544947775] [2024-09-20 19:01:19,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:19,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-20 19:01:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-20 19:01:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 19:01:19,858 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:20,820 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2024-09-20 19:01:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 19:01:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-20 19:01:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:20,821 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:01:20,821 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:01:20,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10092 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-20 19:01:20,822 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:20,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:01:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-20 19:01:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-09-20 19:01:20,837 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 59 [2024-09-20 19:01:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:20,838 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-09-20 19:01:20,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:20,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-09-20 19:01:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 19:01:20,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:20,838 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 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] [2024-09-20 19:01:20,850 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-20 19:01:21,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:21,039 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:21,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1512704896, now seen corresponding path program 28 times [2024-09-20 19:01:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:21,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597639133] [2024-09-20 19:01:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:21,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:21,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:21,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:01:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:21,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597639133] [2024-09-20 19:01:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597639133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402804929] [2024-09-20 19:01:21,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:01:21,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:21,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:21,642 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:21,643 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-20 19:01:21,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:01:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:21,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 19:01:21,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:22,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402804929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:23,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:23,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-20 19:01:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917737225] [2024-09-20 19:01:23,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:23,691 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-20 19:01:23,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-20 19:01:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 19:01:23,693 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:24,603 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2024-09-20 19:01:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 19:01:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-20 19:01:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:24,604 INFO L225 Difference]: With dead ends: 81 [2024-09-20 19:01:24,604 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:01:24,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10053 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-20 19:01:24,606 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:24,606 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:01:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 19:01:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 59 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-09-20 19:01:24,623 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2024-09-20 19:01:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:24,623 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-09-20 19:01:24,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:24,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-09-20 19:01:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 19:01:24,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:24,624 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 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] [2024-09-20 19:01:24,636 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:24,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:24,824 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:24,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1324073462, now seen corresponding path program 29 times [2024-09-20 19:01:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746698753] [2024-09-20 19:01:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:24,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:24,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:25,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:01:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:25,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746698753] [2024-09-20 19:01:25,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746698753] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28446262] [2024-09-20 19:01:25,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:01:25,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:25,441 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:25,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-20 19:01:25,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 19:01:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:25,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:01:25,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:26,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28446262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:27,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:27,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-20 19:01:27,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088595617] [2024-09-20 19:01:27,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:27,803 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-20 19:01:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-20 19:01:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 19:01:27,805 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:28,907 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-09-20 19:01:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 19:01:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-20 19:01:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:28,909 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:01:28,909 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 19:01:28,911 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-20 19:01:28,911 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:28,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 19:01:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-09-20 19:01:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2024-09-20 19:01:28,929 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 60 [2024-09-20 19:01:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:28,929 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2024-09-20 19:01:28,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:28,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2024-09-20 19:01:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 19:01:28,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:28,930 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 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] [2024-09-20 19:01:28,942 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:29,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:29,130 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 46852166, now seen corresponding path program 29 times [2024-09-20 19:01:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150644483] [2024-09-20 19:01:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:29,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:29,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:29,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:01:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150644483] [2024-09-20 19:01:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150644483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615060638] [2024-09-20 19:01:29,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:01:29,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:29,850 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:29,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-20 19:01:30,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 19:01:30,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:30,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:01:30,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:30,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:32,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615060638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:32,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:32,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-20 19:01:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951469632] [2024-09-20 19:01:32,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:32,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-20 19:01:32,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-20 19:01:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 19:01:32,156 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:33,182 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-09-20 19:01:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 19:01:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-20 19:01:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:33,184 INFO L225 Difference]: With dead ends: 82 [2024-09-20 19:01:33,184 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 19:01:33,186 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11330 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-20 19:01:33,186 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:33,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 49 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 19:01:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 19:01:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-09-20 19:01:33,205 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 60 [2024-09-20 19:01:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:33,205 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-09-20 19:01:33,205 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:33,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-09-20 19:01:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 19:01:33,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:33,206 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 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] [2024-09-20 19:01:33,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-20 19:01:33,406 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-09-20 19:01:33,406 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:33,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -222444796, now seen corresponding path program 30 times [2024-09-20 19:01:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:33,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781270998] [2024-09-20 19:01:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:33,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:33,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:33,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:01:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781270998] [2024-09-20 19:01:34,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781270998] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780823493] [2024-09-20 19:01:34,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:01:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:34,112 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:34,113 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-20 19:01:34,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 19:01:34,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:34,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:01:34,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:34,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780823493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:36,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-20 19:01:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716699405] [2024-09-20 19:01:36,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:36,277 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-20 19:01:36,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-20 19:01:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 19:01:36,279 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:37,373 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-09-20 19:01:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 19:01:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-20 19:01:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:37,375 INFO L225 Difference]: With dead ends: 89 [2024-09-20 19:01:37,375 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 19:01:37,377 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-20 19:01:37,377 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:37,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 58 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 19:01:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2024-09-20 19:01:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-09-20 19:01:37,404 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2024-09-20 19:01:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:37,404 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-09-20 19:01:37,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:37,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-09-20 19:01:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 19:01:37,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:37,405 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 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] [2024-09-20 19:01:37,422 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:37,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:37,606 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:37,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2087519675, now seen corresponding path program 30 times [2024-09-20 19:01:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536398370] [2024-09-20 19:01:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:37,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:37,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:37,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:01:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536398370] [2024-09-20 19:01:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536398370] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527716777] [2024-09-20 19:01:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:01:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:38,243 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:38,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-20 19:01:38,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 19:01:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:38,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:01:38,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:39,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:40,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527716777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:40,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-20 19:01:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911414674] [2024-09-20 19:01:40,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:40,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-20 19:01:40,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-20 19:01:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 19:01:40,480 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:41,486 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-09-20 19:01:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 19:01:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-20 19:01:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:41,487 INFO L225 Difference]: With dead ends: 83 [2024-09-20 19:01:41,487 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 19:01:41,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11248 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-20 19:01:41,489 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:41,489 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 19:01:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-20 19:01:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 61 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2024-09-20 19:01:41,508 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 61 [2024-09-20 19:01:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:41,509 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2024-09-20 19:01:41,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2024-09-20 19:01:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 19:01:41,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:41,509 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 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] [2024-09-20 19:01:41,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:41,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:41,710 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:41,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash -892633471, now seen corresponding path program 31 times [2024-09-20 19:01:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:41,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380696048] [2024-09-20 19:01:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:41,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:41,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:41,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:42,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:01:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:42,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380696048] [2024-09-20 19:01:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380696048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398053332] [2024-09-20 19:01:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:01:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:42,384 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:42,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-20 19:01:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:42,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 19:01:42,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:43,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:44,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398053332] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:44,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-20 19:01:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965876283] [2024-09-20 19:01:44,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:44,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-20 19:01:44,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-20 19:01:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-20 19:01:44,952 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:46,152 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-09-20 19:01:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:01:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-20 19:01:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:46,154 INFO L225 Difference]: With dead ends: 89 [2024-09-20 19:01:46,154 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 19:01:46,155 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12561 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-20 19:01:46,155 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:46,155 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 19:01:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-20 19:01:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2024-09-20 19:01:46,181 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 62 [2024-09-20 19:01:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:46,181 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2024-09-20 19:01:46,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:46,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2024-09-20 19:01:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 19:01:46,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:46,182 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 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] [2024-09-20 19:01:46,199 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-20 19:01:46,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-20 19:01:46,383 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:46,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1878269953, now seen corresponding path program 31 times [2024-09-20 19:01:46,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:46,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050597164] [2024-09-20 19:01:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:46,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:46,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:46,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:01:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:47,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050597164] [2024-09-20 19:01:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050597164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768571319] [2024-09-20 19:01:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:01:47,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:47,156 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:47,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-20 19:01:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 19:01:47,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:48,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768571319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:49,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-20 19:01:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540165428] [2024-09-20 19:01:49,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:49,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-20 19:01:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-20 19:01:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-20 19:01:49,629 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:50,778 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-09-20 19:01:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:01:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-20 19:01:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:50,780 INFO L225 Difference]: With dead ends: 84 [2024-09-20 19:01:50,780 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 19:01:50,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12597 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-20 19:01:50,781 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:50,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 19:01:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 19:01:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-09-20 19:01:50,807 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 62 [2024-09-20 19:01:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:50,807 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-09-20 19:01:50,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-09-20 19:01:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:01:50,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:50,808 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 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] [2024-09-20 19:01:50,821 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-09-20 19:01:51,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:51,009 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:51,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:51,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1210559739, now seen corresponding path program 32 times [2024-09-20 19:01:51,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:51,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943084000] [2024-09-20 19:01:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:51,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:01:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:51,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943084000] [2024-09-20 19:01:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943084000] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404639666] [2024-09-20 19:01:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:01:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:51,767 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:51,768 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-20 19:01:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:01:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:51,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 19:01:51,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:52,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:54,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404639666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:54,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:54,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-20 19:01:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753377193] [2024-09-20 19:01:54,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:54,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-20 19:01:54,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-20 19:01:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-20 19:01:54,105 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:55,241 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2024-09-20 19:01:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:01:55,241 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-20 19:01:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:55,242 INFO L225 Difference]: With dead ends: 91 [2024-09-20 19:01:55,242 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 19:01:55,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12553 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-20 19:01:55,244 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:55,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:01:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 19:01:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-09-20 19:01:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-09-20 19:01:55,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2024-09-20 19:01:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:55,274 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-09-20 19:01:55,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:55,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-09-20 19:01:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:01:55,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:55,275 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 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] [2024-09-20 19:01:55,292 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:55,475 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:55,475 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:55,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1268071072, now seen corresponding path program 32 times [2024-09-20 19:01:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955131355] [2024-09-20 19:01:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:55,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:55,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:55,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:01:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:56,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:56,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955131355] [2024-09-20 19:01:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955131355] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:56,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123092320] [2024-09-20 19:01:56,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:01:56,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:56,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:56,131 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:01:56,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-20 19:01:56,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:01:56,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:56,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 19:01:56,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:57,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:01:58,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123092320] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:58,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:58,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-20 19:01:58,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906466453] [2024-09-20 19:01:58,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:58,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-20 19:01:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-20 19:01:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-20 19:01:58,581 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:59,615 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2024-09-20 19:01:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:01:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-20 19:01:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:59,617 INFO L225 Difference]: With dead ends: 85 [2024-09-20 19:01:59,617 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 19:01:59,618 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12604 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-20 19:01:59,618 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:59,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 31 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:01:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 19:01:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 19:01:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:01:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-09-20 19:01:59,636 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2024-09-20 19:01:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:59,636 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-09-20 19:01:59,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:01:59,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-09-20 19:01:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 19:01:59,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:59,637 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 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] [2024-09-20 19:01:59,650 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:59,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:59,838 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 580834154, now seen corresponding path program 33 times [2024-09-20 19:01:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:59,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159391478] [2024-09-20 19:01:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:59,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:59,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:01:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:00,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:02:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159391478] [2024-09-20 19:02:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159391478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496625211] [2024-09-20 19:02:00,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:02:00,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:00,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:00,582 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-20 19:02:00,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 19:02:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:00,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 19:02:00,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:01,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:03,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496625211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:03,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:03,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-20 19:02:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720659698] [2024-09-20 19:02:03,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:03,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-20 19:02:03,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-20 19:02:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-20 19:02:03,455 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:04,638 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-09-20 19:02:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 19:02:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-20 19:02:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:04,639 INFO L225 Difference]: With dead ends: 91 [2024-09-20 19:02:04,639 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 19:02:04,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13893 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-20 19:02:04,641 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:04,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:02:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 19:02:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-09-20 19:02:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2024-09-20 19:02:04,676 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 64 [2024-09-20 19:02:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:04,676 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2024-09-20 19:02:04,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2024-09-20 19:02:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 19:02:04,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:04,677 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 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] [2024-09-20 19:02:04,690 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-20 19:02:04,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:04,878 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:04,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -493591002, now seen corresponding path program 33 times [2024-09-20 19:02:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:04,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872616613] [2024-09-20 19:02:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:04,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:04,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:05,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:02:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872616613] [2024-09-20 19:02:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872616613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850147157] [2024-09-20 19:02:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:02:05,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:05,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:05,728 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:05,729 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-20 19:02:05,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 19:02:05,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:05,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 19:02:05,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:06,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:08,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850147157] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:08,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:08,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-20 19:02:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171723635] [2024-09-20 19:02:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:08,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-20 19:02:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-20 19:02:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-20 19:02:08,391 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:09,682 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-09-20 19:02:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 19:02:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-20 19:02:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:09,684 INFO L225 Difference]: With dead ends: 86 [2024-09-20 19:02:09,684 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:02:09,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13931 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-20 19:02:09,685 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:09,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:02:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:02:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 19:02:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-09-20 19:02:09,707 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 64 [2024-09-20 19:02:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:09,707 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-09-20 19:02:09,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:09,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-09-20 19:02:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 19:02:09,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:09,708 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 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] [2024-09-20 19:02:09,726 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-20 19:02:09,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:09,909 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:09,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1180087452, now seen corresponding path program 34 times [2024-09-20 19:02:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15691644] [2024-09-20 19:02:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:10,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:10,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:10,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:10,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15691644] [2024-09-20 19:02:10,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15691644] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716330598] [2024-09-20 19:02:10,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:02:10,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:10,734 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:10,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-20 19:02:10,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:02:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:10,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 19:02:10,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:11,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716330598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:13,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:13,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-20 19:02:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211013977] [2024-09-20 19:02:13,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:13,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-20 19:02:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-20 19:02:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-20 19:02:13,324 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:14,583 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-09-20 19:02:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 19:02:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-20 19:02:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:14,584 INFO L225 Difference]: With dead ends: 93 [2024-09-20 19:02:14,584 INFO L226 Difference]: Without dead ends: 83 [2024-09-20 19:02:14,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13844 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-20 19:02:14,586 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:14,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 52 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:02:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-20 19:02:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-20 19:02:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-09-20 19:02:14,615 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 65 [2024-09-20 19:02:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:14,616 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-09-20 19:02:14,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:14,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-09-20 19:02:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 19:02:14,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:14,617 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 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] [2024-09-20 19:02:14,636 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:14,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:14,817 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1781316645, now seen corresponding path program 34 times [2024-09-20 19:02:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:14,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410422731] [2024-09-20 19:02:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:14,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:14,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:15,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:02:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410422731] [2024-09-20 19:02:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410422731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474031279] [2024-09-20 19:02:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:02:15,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:15,532 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:15,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-20 19:02:15,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:02:15,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:15,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 19:02:15,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:16,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474031279] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:18,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-20 19:02:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805015515] [2024-09-20 19:02:18,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:18,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-20 19:02:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-20 19:02:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-20 19:02:18,247 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:19,462 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-09-20 19:02:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 19:02:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-20 19:02:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:19,463 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:02:19,463 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 19:02:19,466 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13839 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-20 19:02:19,466 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:19,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 49 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:02:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 19:02:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 19:02:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2024-09-20 19:02:19,490 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2024-09-20 19:02:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:19,490 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2024-09-20 19:02:19,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:19,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2024-09-20 19:02:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 19:02:19,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:19,491 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 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] [2024-09-20 19:02:19,503 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:19,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:19,691 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:19,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash -514784735, now seen corresponding path program 35 times [2024-09-20 19:02:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674525997] [2024-09-20 19:02:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:19,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:19,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:20,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:20,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674525997] [2024-09-20 19:02:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674525997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94501038] [2024-09-20 19:02:20,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:02:20,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:20,453 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:20,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-20 19:02:20,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-20 19:02:20,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:20,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:02:20,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:21,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94501038] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:23,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:23,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-20 19:02:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436712281] [2024-09-20 19:02:23,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:23,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-20 19:02:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-20 19:02:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-20 19:02:23,501 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:24,749 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-09-20 19:02:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 19:02:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-20 19:02:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:24,751 INFO L225 Difference]: With dead ends: 93 [2024-09-20 19:02:24,751 INFO L226 Difference]: Without dead ends: 82 [2024-09-20 19:02:24,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-20 19:02:24,752 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:24,752 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:02:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-20 19:02:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-09-20 19:02:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-09-20 19:02:24,771 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2024-09-20 19:02:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:24,771 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-09-20 19:02:24,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:24,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-09-20 19:02:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 19:02:24,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:24,772 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 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] [2024-09-20 19:02:24,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:24,972 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:24,973 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:24,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash -535311583, now seen corresponding path program 35 times [2024-09-20 19:02:24,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:24,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810444922] [2024-09-20 19:02:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:24,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:25,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:25,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:25,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810444922] [2024-09-20 19:02:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810444922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096943815] [2024-09-20 19:02:26,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:02:26,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:26,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:26,142 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-20 19:02:26,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-20 19:02:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:26,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:02:26,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:27,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096943815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:29,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-20 19:02:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002426364] [2024-09-20 19:02:29,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:29,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-20 19:02:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-20 19:02:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-20 19:02:29,048 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:30,440 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-09-20 19:02:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 19:02:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-20 19:02:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:30,441 INFO L225 Difference]: With dead ends: 88 [2024-09-20 19:02:30,441 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 19:02:30,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15373 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-20 19:02:30,444 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:30,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:02:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 19:02:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-20 19:02:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 69 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-09-20 19:02:30,474 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 66 [2024-09-20 19:02:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:30,474 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-09-20 19:02:30,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:30,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-09-20 19:02:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 19:02:30,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:30,475 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 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] [2024-09-20 19:02:30,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-20 19:02:30,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:30,676 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -543333477, now seen corresponding path program 36 times [2024-09-20 19:02:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681197931] [2024-09-20 19:02:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:30,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:30,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:31,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:02:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:31,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:31,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681197931] [2024-09-20 19:02:31,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681197931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:31,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107317878] [2024-09-20 19:02:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:02:31,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:31,556 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:31,557 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-20 19:02:31,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 19:02:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:31,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 19:02:31,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:32,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:34,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107317878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:34,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:34,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-20 19:02:34,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745976434] [2024-09-20 19:02:34,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:34,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-20 19:02:34,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-20 19:02:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 19:02:34,285 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:35,555 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-09-20 19:02:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 19:02:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-20 19:02:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:35,556 INFO L225 Difference]: With dead ends: 95 [2024-09-20 19:02:35,556 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 19:02:35,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15240 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-20 19:02:35,559 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:35,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:02:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 19:02:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-09-20 19:02:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-09-20 19:02:35,590 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2024-09-20 19:02:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:35,591 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-09-20 19:02:35,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:35,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-09-20 19:02:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 19:02:35,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:35,592 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 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] [2024-09-20 19:02:35,610 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:35,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-20 19:02:35,792 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:35,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1220312640, now seen corresponding path program 36 times [2024-09-20 19:02:35,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386932884] [2024-09-20 19:02:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:35,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:35,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:36,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386932884] [2024-09-20 19:02:36,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386932884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035893441] [2024-09-20 19:02:36,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:02:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:36,541 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:36,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-20 19:02:36,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 19:02:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:36,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 19:02:36,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:37,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035893441] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:39,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:39,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-20 19:02:39,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798092345] [2024-09-20 19:02:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:39,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-20 19:02:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-20 19:02:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 19:02:39,425 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:40,582 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2024-09-20 19:02:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 19:02:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-20 19:02:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:40,583 INFO L225 Difference]: With dead ends: 89 [2024-09-20 19:02:40,583 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:02:40,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15339 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-20 19:02:40,586 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:40,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:02:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:02:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 19:02:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-09-20 19:02:40,615 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2024-09-20 19:02:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:40,615 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-09-20 19:02:40,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:40,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-09-20 19:02:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 19:02:40,616 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:40,616 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 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] [2024-09-20 19:02:40,628 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-09-20 19:02:40,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:40,816 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:40,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2044719306, now seen corresponding path program 37 times [2024-09-20 19:02:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:40,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892583949] [2024-09-20 19:02:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:40,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:40,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:41,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:02:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:41,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892583949] [2024-09-20 19:02:41,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892583949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:41,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829624777] [2024-09-20 19:02:41,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:02:41,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:41,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:41,630 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:41,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-20 19:02:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:41,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 19:02:41,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:42,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:44,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829624777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:44,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:44,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-20 19:02:44,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280522178] [2024-09-20 19:02:44,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:44,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-20 19:02:44,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-20 19:02:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 19:02:44,822 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:46,289 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-09-20 19:02:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 19:02:46,289 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-20 19:02:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:46,290 INFO L225 Difference]: With dead ends: 95 [2024-09-20 19:02:46,290 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 19:02:46,292 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16758 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-20 19:02:46,292 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:46,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 73 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:02:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 19:02:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-09-20 19:02:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-09-20 19:02:46,314 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2024-09-20 19:02:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:46,314 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-09-20 19:02:46,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:46,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-09-20 19:02:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 19:02:46,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:46,315 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 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] [2024-09-20 19:02:46,327 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-20 19:02:46,515 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:46,515 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:46,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 335301638, now seen corresponding path program 37 times [2024-09-20 19:02:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64495395] [2024-09-20 19:02:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:46,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:46,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:46,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:02:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64495395] [2024-09-20 19:02:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64495395] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454151077] [2024-09-20 19:02:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:02:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:47,457 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:47,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-20 19:02:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:47,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 19:02:47,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:48,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:50,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454151077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:50,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:50,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-20 19:02:50,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563119521] [2024-09-20 19:02:50,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:50,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-20 19:02:50,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-20 19:02:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 19:02:50,542 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:52,000 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2024-09-20 19:02:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 19:02:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-20 19:02:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:52,001 INFO L225 Difference]: With dead ends: 90 [2024-09-20 19:02:52,001 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 19:02:52,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16843 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-20 19:02:52,002 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:52,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 76 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:02:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 19:02:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 19:02:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 71 states have internal predecessors, (75), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-09-20 19:02:52,024 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 68 [2024-09-20 19:02:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:52,024 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-09-20 19:02:52,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-09-20 19:02:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-20 19:02:52,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:52,025 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 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] [2024-09-20 19:02:52,044 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-20 19:02:52,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:52,226 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:52,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 379182020, now seen corresponding path program 38 times [2024-09-20 19:02:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518711449] [2024-09-20 19:02:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:52,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:52,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:52,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:02:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518711449] [2024-09-20 19:02:53,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518711449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454715293] [2024-09-20 19:02:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:02:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:53,212 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:53,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-20 19:02:53,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:02:53,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:53,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 19:02:53,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:54,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454715293] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:56,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:56,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2024-09-20 19:02:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187343882] [2024-09-20 19:02:56,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:56,130 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-09-20 19:02:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-09-20 19:02:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2024-09-20 19:02:56,132 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 140 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 139 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:57,564 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2024-09-20 19:02:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 19:02:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 139 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2024-09-20 19:02:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:57,565 INFO L225 Difference]: With dead ends: 97 [2024-09-20 19:02:57,565 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 19:02:57,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16703 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5529, Invalid=30003, Unknown=0, NotChecked=0, Total=35532 [2024-09-20 19:02:57,568 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:57,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 58 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:02:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 19:02:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2024-09-20 19:02:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:02:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2024-09-20 19:02:57,601 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 69 [2024-09-20 19:02:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:57,601 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2024-09-20 19:02:57,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 139 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:02:57,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2024-09-20 19:02:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-20 19:02:57,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:57,602 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 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] [2024-09-20 19:02:57,620 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-09-20 19:02:57,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:57,802 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1855448581, now seen corresponding path program 38 times [2024-09-20 19:02:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676096440] [2024-09-20 19:02:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:57,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:57,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 19:02:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:58,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:02:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:58,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676096440] [2024-09-20 19:02:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676096440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785241974] [2024-09-20 19:02:58,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:02:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:58,600 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:02:58,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-20 19:02:58,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:02:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:58,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 19:02:58,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:02:59,801 INFO L327 TraceCheckSpWp]: Computing backward predicates...